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ExpandoObject Class

Represents an object whose members can be dynamically added and removed at run time.

System::Object
  System.Dynamic::ExpandoObject

Namespace:  System.Dynamic
Assembly:  System.Core (in System.Core.dll)

public ref class ExpandoObject sealed : IDynamicMetaObjectProvider, 
	IDictionary<String^, Object^>, ICollection<KeyValuePair<String^, Object^>>, 
	IEnumerable<KeyValuePair<String^, Object^>>, IEnumerable, 
	INotifyPropertyChanged

The ExpandoObject type exposes the following members.

  NameDescription
Public methodExpandoObjectInitializes a new ExpandoObject that does not have members.
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  NameDescription
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public Extension MethodAggregate<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, KeyValuePair<String, Object>, KeyValuePair<String, Object>>)Overloaded. Applies an accumulator function over a sequence. (Defined by Enumerable.)
Public Extension MethodAggregate<KeyValuePair<String, Object>, TAccumulate>(TAccumulate, Func<TAccumulate, KeyValuePair<String, Object>, TAccumulate>)Overloaded. Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value. (Defined by Enumerable.)
Public Extension MethodAggregate<KeyValuePair<String, Object>, TAccumulate, TResult>(TAccumulate, Func<TAccumulate, KeyValuePair<String, Object>, TAccumulate>, Func<TAccumulate, TResult>)Overloaded. Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value. (Defined by Enumerable.)
Public Extension MethodAll<KeyValuePair<String, Object>>Determines whether all elements of a sequence satisfy a condition. (Defined by Enumerable.)
Public Extension MethodAny<KeyValuePair<String, Object>>()Overloaded. Determines whether a sequence contains any elements. (Defined by Enumerable.)
Public Extension MethodAny<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Determines whether any element of a sequence satisfies a condition. (Defined by Enumerable.)
Public Extension MethodAsEnumerable<KeyValuePair<String, Object>>Returns the input typed as IEnumerable<T>. (Defined by Enumerable.)
Public Extension MethodAsParallel()Overloaded. Enables parallelization of a query. (Defined by ParallelEnumerable.)
Public Extension MethodAsParallel<KeyValuePair<String, Object>>()Overloaded. Enables parallelization of a query. (Defined by ParallelEnumerable.)
Public Extension MethodAsQueryable()Overloaded. Converts an IEnumerable to an IQueryable. (Defined by Queryable.)
Public Extension MethodAsQueryable<KeyValuePair<String, Object>>()Overloaded. Converts a generic IEnumerable<T> to a generic IQueryable<T>. (Defined by Queryable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Decimal>>)Overloaded. Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Double>>)Overloaded. Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int32>)Overloaded. Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Int32>>)Overloaded. Computes the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int64>)Overloaded. Computes the average of a sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Int64>>)Overloaded. Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Single>)Overloaded. Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Single>>)Overloaded. Computes the average of a sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Double>)Overloaded. Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodAverage<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Decimal>)Overloaded. Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodCast<TResult>Converts the elements of an IEnumerable to the specified type. (Defined by Enumerable.)
Public Extension MethodConcat<KeyValuePair<String, Object>>Concatenates two sequences. (Defined by Enumerable.)
Public Extension MethodContains<KeyValuePair<String, Object>>(KeyValuePair<String, Object>)Overloaded. Determines whether a sequence contains a specified element by using the default equality comparer. (Defined by Enumerable.)
Public Extension MethodContains<KeyValuePair<String, Object>>(KeyValuePair<String, Object>, IEqualityComparer<KeyValuePair<String, Object>>)Overloaded. Determines whether a sequence contains a specified element by using a specified IEqualityComparer<T>. (Defined by Enumerable.)
Public Extension MethodCount<KeyValuePair<String, Object>>()Overloaded. Returns the number of elements in a sequence. (Defined by Enumerable.)
Public Extension MethodCount<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns a number that represents how many elements in the specified sequence satisfy a condition. (Defined by Enumerable.)
Public Extension MethodDefaultIfEmpty<KeyValuePair<String, Object>>()Overloaded. Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty. (Defined by Enumerable.)
Public Extension MethodDefaultIfEmpty<KeyValuePair<String, Object>>(KeyValuePair<String, Object>)Overloaded. Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty. (Defined by Enumerable.)
Public Extension MethodDistinct<KeyValuePair<String, Object>>()Overloaded. Returns distinct elements from a sequence by using the default equality comparer to compare values. (Defined by Enumerable.)
Public Extension MethodDistinct<KeyValuePair<String, Object>>(IEqualityComparer<KeyValuePair<String, Object>>)Overloaded. Returns distinct elements from a sequence by using a specified IEqualityComparer<T> to compare values. (Defined by Enumerable.)
Public Extension MethodElementAt<KeyValuePair<String, Object>>Returns the element at a specified index in a sequence. (Defined by Enumerable.)
Public Extension MethodElementAtOrDefault<KeyValuePair<String, Object>>Returns the element at a specified index in a sequence or a default value if the index is out of range. (Defined by Enumerable.)
Public Extension MethodExcept<KeyValuePair<String, Object>>(IEnumerable<KeyValuePair<String, Object>>)Overloaded. Produces the set difference of two sequences by using the default equality comparer to compare values. (Defined by Enumerable.)
Public Extension MethodExcept<KeyValuePair<String, Object>>(IEnumerable<KeyValuePair<String, Object>>, IEqualityComparer<KeyValuePair<String, Object>>)Overloaded. Produces the set difference of two sequences by using the specified IEqualityComparer<T> to compare values. (Defined by Enumerable.)
Public Extension MethodFirst<KeyValuePair<String, Object>>()Overloaded. Returns the first element of a sequence. (Defined by Enumerable.)
Public Extension MethodFirst<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns the first element in a sequence that satisfies a specified condition. (Defined by Enumerable.)
Public Extension MethodFirstOrDefault<KeyValuePair<String, Object>>()Overloaded. Returns the first element of a sequence, or a default value if the sequence contains no elements. (Defined by Enumerable.)
Public Extension MethodFirstOrDefault<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns the first element of the sequence that satisfies a condition or a default value if no such element is found. (Defined by Enumerable.)
Public Extension MethodGroupBy<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>)Overloaded. Groups the elements of a sequence according to a specified key selector function. (Defined by Enumerable.)
Public Extension MethodGroupBy<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>, IEqualityComparer<TKey>)Overloaded. Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer. (Defined by Enumerable.)
Public Extension MethodGroupBy<KeyValuePair<String, Object>, TKey, TElement>(Func<KeyValuePair<String, Object>, TKey>, Func<KeyValuePair<String, Object>, TElement>)Overloaded. Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function. (Defined by Enumerable.)
Public Extension MethodGroupBy<KeyValuePair<String, Object>, TKey, TResult>(Func<KeyValuePair<String, Object>, TKey>, Func<TKey, IEnumerable<KeyValuePair<String, Object>>, TResult>)Overloaded. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. (Defined by Enumerable.)
Public Extension MethodGroupBy<KeyValuePair<String, Object>, TKey, TElement>(Func<KeyValuePair<String, Object>, TKey>, Func<KeyValuePair<String, Object>, TElement>, IEqualityComparer<TKey>)Overloaded. Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function. (Defined by Enumerable.)
Public Extension MethodGroupBy<KeyValuePair<String, Object>, TKey, TResult>(Func<KeyValuePair<String, Object>, TKey>, Func<TKey, IEnumerable<KeyValuePair<String, Object>>, TResult>, IEqualityComparer<TKey>)Overloaded. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The keys are compared by using a specified comparer. (Defined by Enumerable.)
Public Extension MethodGroupBy<KeyValuePair<String, Object>, TKey, TElement, TResult>(Func<KeyValuePair<String, Object>, TKey>, Func<KeyValuePair<String, Object>, TElement>, Func<TKey, IEnumerable<TElement>, TResult>)Overloaded. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function. (Defined by Enumerable.)
Public Extension MethodGroupBy<KeyValuePair<String, Object>, TKey, TElement, TResult>(Func<KeyValuePair<String, Object>, TKey>, Func<KeyValuePair<String, Object>, TElement>, Func<TKey, IEnumerable<TElement>, TResult>, IEqualityComparer<TKey>)Overloaded. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function. (Defined by Enumerable.)
Public Extension MethodGroupJoin<KeyValuePair<String, Object>, TInner, TKey, TResult>(IEnumerable<TInner>, Func<KeyValuePair<String, Object>, TKey>, Func<TInner, TKey>, Func<KeyValuePair<String, Object>, IEnumerable<TInner>, TResult>)Overloaded. Correlates the elements of two sequences based on equality of keys and groups the results. The default equality comparer is used to compare keys. (Defined by Enumerable.)
Public Extension MethodGroupJoin<KeyValuePair<String, Object>, TInner, TKey, TResult>(IEnumerable<TInner>, Func<KeyValuePair<String, Object>, TKey>, Func<TInner, TKey>, Func<KeyValuePair<String, Object>, IEnumerable<TInner>, TResult>, IEqualityComparer<TKey>)Overloaded. Correlates the elements of two sequences based on key equality and groups the results. A specified IEqualityComparer<T> is used to compare keys. (Defined by Enumerable.)
Public Extension MethodIntersect<KeyValuePair<String, Object>>(IEnumerable<KeyValuePair<String, Object>>)Overloaded. Produces the set intersection of two sequences by using the default equality comparer to compare values. (Defined by Enumerable.)
Public Extension MethodIntersect<KeyValuePair<String, Object>>(IEnumerable<KeyValuePair<String, Object>>, IEqualityComparer<KeyValuePair<String, Object>>)Overloaded. Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values. (Defined by Enumerable.)
Public Extension MethodJoin<KeyValuePair<String, Object>, TInner, TKey, TResult>(IEnumerable<TInner>, Func<KeyValuePair<String, Object>, TKey>, Func<TInner, TKey>, Func<KeyValuePair<String, Object>, TInner, TResult>)Overloaded. Correlates the elements of two sequences based on matching keys. The default equality comparer is used to compare keys. (Defined by Enumerable.)
Public Extension MethodJoin<KeyValuePair<String, Object>, TInner, TKey, TResult>(IEnumerable<TInner>, Func<KeyValuePair<String, Object>, TKey>, Func<TInner, TKey>, Func<KeyValuePair<String, Object>, TInner, TResult>, IEqualityComparer<TKey>)Overloaded. Correlates the elements of two sequences based on matching keys. A specified IEqualityComparer<T> is used to compare keys. (Defined by Enumerable.)
Public Extension MethodLast<KeyValuePair<String, Object>>()Overloaded. Returns the last element of a sequence. (Defined by Enumerable.)
Public Extension MethodLast<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns the last element of a sequence that satisfies a specified condition. (Defined by Enumerable.)
Public Extension MethodLastOrDefault<KeyValuePair<String, Object>>()Overloaded. Returns the last element of a sequence, or a default value if the sequence contains no elements. (Defined by Enumerable.)
Public Extension MethodLastOrDefault<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns the last element of a sequence that satisfies a condition or a default value if no such element is found. (Defined by Enumerable.)
Public Extension MethodLongCount<KeyValuePair<String, Object>>()Overloaded. Returns an Int64 that represents the total number of elements in a sequence. (Defined by Enumerable.)
Public Extension MethodLongCount<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns an Int64 that represents how many elements in a sequence satisfy a condition. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>()Overloaded. Returns the maximum value in a generic sequence. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Decimal>>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Double>>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Double value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int32>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Int32 value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Int32>>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int64>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Int64 value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Int64>>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Single>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Single value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Single>>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Single value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Double>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Double value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Decimal>)Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Decimal value. (Defined by Enumerable.)
Public Extension MethodMax<KeyValuePair<String, Object>, TResult>(Func<KeyValuePair<String, Object>, TResult>)Overloaded. Invokes a transform function on each element of a generic sequence and returns the maximum resulting value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>()Overloaded. Returns the minimum value in a generic sequence. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Decimal>>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Double>>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Double value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int32>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Int32 value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Int32>>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int64>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Int64 value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Int64>>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Single>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Single value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Single>>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Single value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Double>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Double value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Decimal>)Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Decimal value. (Defined by Enumerable.)
Public Extension MethodMin<KeyValuePair<String, Object>, TResult>(Func<KeyValuePair<String, Object>, TResult>)Overloaded. Invokes a transform function on each element of a generic sequence and returns the minimum resulting value. (Defined by Enumerable.)
Public Extension MethodOfType<TResult>Filters the elements of an IEnumerable based on a specified type. (Defined by Enumerable.)
Public Extension MethodOrderBy<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>)Overloaded. Sorts the elements of a sequence in ascending order according to a key. (Defined by Enumerable.)
Public Extension MethodOrderBy<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>, IComparer<TKey>)Overloaded. Sorts the elements of a sequence in ascending order by using a specified comparer. (Defined by Enumerable.)
Public Extension MethodOrderByDescending<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>)Overloaded. Sorts the elements of a sequence in descending order according to a key. (Defined by Enumerable.)
Public Extension MethodOrderByDescending<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>, IComparer<TKey>)Overloaded. Sorts the elements of a sequence in descending order by using a specified comparer. (Defined by Enumerable.)
Public Extension MethodReverse<KeyValuePair<String, Object>>Inverts the order of the elements in a sequence. (Defined by Enumerable.)
Public Extension MethodSelect<KeyValuePair<String, Object>, TResult>(Func<KeyValuePair<String, Object>, TResult>)Overloaded. Projects each element of a sequence into a new form. (Defined by Enumerable.)
Public Extension MethodSelect<KeyValuePair<String, Object>, TResult>(Func<KeyValuePair<String, Object>, Int32, TResult>)Overloaded. Projects each element of a sequence into a new form by incorporating the element's index. (Defined by Enumerable.)
Public Extension MethodSelectMany<KeyValuePair<String, Object>, TResult>(Func<KeyValuePair<String, Object>, IEnumerable<TResult>>)Overloaded. Projects each element of a sequence to an IEnumerable<T> and flattens the resulting sequences into one sequence. (Defined by Enumerable.)
Public Extension MethodSelectMany<KeyValuePair<String, Object>, TResult>(Func<KeyValuePair<String, Object>, Int32, IEnumerable<TResult>>)Overloaded. Projects each element of a sequence to an IEnumerable<T>, and flattens the resulting sequences into one sequence. The index of each source element is used in the projected form of that element. (Defined by Enumerable.)
Public Extension MethodSelectMany<KeyValuePair<String, Object>, TCollection, TResult>(Func<KeyValuePair<String, Object>, Int32, IEnumerable<TCollection>>, Func<KeyValuePair<String, Object>, TCollection, TResult>)Overloaded. Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. The index of each source element is used in the intermediate projected form of that element. (Defined by Enumerable.)
Public Extension MethodSelectMany<KeyValuePair<String, Object>, TCollection, TResult>(Func<KeyValuePair<String, Object>, IEnumerable<TCollection>>, Func<KeyValuePair<String, Object>, TCollection, TResult>)Overloaded. Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. (Defined by Enumerable.)
Public Extension MethodSequenceEqual<KeyValuePair<String, Object>>(IEnumerable<KeyValuePair<String, Object>>)Overloaded. Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type. (Defined by Enumerable.)
Public Extension MethodSequenceEqual<KeyValuePair<String, Object>>(IEnumerable<KeyValuePair<String, Object>>, IEqualityComparer<KeyValuePair<String, Object>>)Overloaded. Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>. (Defined by Enumerable.)
Public Extension MethodSingle<KeyValuePair<String, Object>>()Overloaded. Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence. (Defined by Enumerable.)
Public Extension MethodSingle<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists. (Defined by Enumerable.)
Public Extension MethodSingleOrDefault<KeyValuePair<String, Object>>()Overloaded. Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. (Defined by Enumerable.)
Public Extension MethodSingleOrDefault<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. (Defined by Enumerable.)
Public Extension MethodSkip<KeyValuePair<String, Object>>Bypasses a specified number of elements in a sequence and then returns the remaining elements. (Defined by Enumerable.)
Public Extension MethodSkipWhile<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. (Defined by Enumerable.)
Public Extension MethodSkipWhile<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int32, Boolean>)Overloaded. Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. The element's index is used in the logic of the predicate function. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Decimal>>)Overloaded. Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Double>>)Overloaded. Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int32>)Overloaded. Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Int32>>)Overloaded. Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int64>)Overloaded. Computes the sum of the sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Int64>>)Overloaded. Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Single>)Overloaded. Computes the sum of the sequence of Single values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Nullable<Single>>)Overloaded. Computes the sum of the sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Double>)Overloaded. Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodSum<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Decimal>)Overloaded. Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.)
Public Extension MethodTake<KeyValuePair<String, Object>>Returns a specified number of contiguous elements from the start of a sequence. (Defined by Enumerable.)
Public Extension MethodTakeWhile<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Returns elements from a sequence as long as a specified condition is true. (Defined by Enumerable.)
Public Extension MethodTakeWhile<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int32, Boolean>)Overloaded. Returns elements from a sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function. (Defined by Enumerable.)
Public Extension MethodToArray<KeyValuePair<String, Object>>Creates an array from a IEnumerable<T>. (Defined by Enumerable.)
Public Extension MethodToDictionary<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>)Overloaded. Creates a Dictionary<TKey, TValue> from an IEnumerable<T> according to a specified key selector function. (Defined by Enumerable.)
Public Extension MethodToDictionary<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>, IEqualityComparer<TKey>)Overloaded. Creates a Dictionary<TKey, TValue> from an IEnumerable<T> according to a specified key selector function and key comparer. (Defined by Enumerable.)
Public Extension MethodToDictionary<KeyValuePair<String, Object>, TKey, TElement>(Func<KeyValuePair<String, Object>, TKey>, Func<KeyValuePair<String, Object>, TElement>)Overloaded. Creates a Dictionary<TKey, TValue> from an IEnumerable<T> according to specified key selector and element selector functions. (Defined by Enumerable.)
Public Extension MethodToDictionary<KeyValuePair<String, Object>, TKey, TElement>(Func<KeyValuePair<String, Object>, TKey>, Func<KeyValuePair<String, Object>, TElement>, IEqualityComparer<TKey>)Overloaded. Creates a Dictionary<TKey, TValue> from an IEnumerable<T> according to a specified key selector function, a comparer, and an element selector function. (Defined by Enumerable.)
Public Extension MethodToList<KeyValuePair<String, Object>>Creates a List<T> from an IEnumerable<T>. (Defined by Enumerable.)
Public Extension MethodToLookup<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>)Overloaded. Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to a specified key selector function. (Defined by Enumerable.)
Public Extension MethodToLookup<KeyValuePair<String, Object>, TKey>(Func<KeyValuePair<String, Object>, TKey>, IEqualityComparer<TKey>)Overloaded. Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to a specified key selector function and key comparer. (Defined by Enumerable.)
Public Extension MethodToLookup<KeyValuePair<String, Object>, TKey, TElement>(Func<KeyValuePair<String, Object>, TKey>, Func<KeyValuePair<String, Object>, TElement>)Overloaded. Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to specified key selector and element selector functions. (Defined by Enumerable.)
Public Extension MethodToLookup<KeyValuePair<String, Object>, TKey, TElement>(Func<KeyValuePair<String, Object>, TKey>, Func<KeyValuePair<String, Object>, TElement>, IEqualityComparer<TKey>)Overloaded. Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to a specified key selector function, a comparer and an element selector function. (Defined by Enumerable.)
Public Extension MethodUnion<KeyValuePair<String, Object>>(IEnumerable<KeyValuePair<String, Object>>)Overloaded. Produces the set union of two sequences by using the default equality comparer. (Defined by Enumerable.)
Public Extension MethodUnion<KeyValuePair<String, Object>>(IEnumerable<KeyValuePair<String, Object>>, IEqualityComparer<KeyValuePair<String, Object>>)Overloaded. Produces the set union of two sequences by using a specified IEqualityComparer<T>. (Defined by Enumerable.)
Public Extension MethodWhere<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Boolean>)Overloaded. Filters a sequence of values based on a predicate. (Defined by Enumerable.)
Public Extension MethodWhere<KeyValuePair<String, Object>>(Func<KeyValuePair<String, Object>, Int32, Boolean>)Overloaded. Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. (Defined by Enumerable.)
Public Extension MethodZip<KeyValuePair<String, Object>, TSecond, TResult>Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results. (Defined by Enumerable.)
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  NameDescription
Explicit interface implemetationPrivate methodICollection<KeyValuePair<String, Object>>::AddAdds the specified value to the ICollection<T> that has the specified key.
Explicit interface implemetationPrivate methodICollection<KeyValuePair<String, Object>>::ClearRemoves all items from the collection.
Explicit interface implemetationPrivate methodICollection<KeyValuePair<String, Object>>::ContainsDetermines whether the ICollection<T> contains a specific key and value.
Explicit interface implemetationPrivate methodICollection<KeyValuePair<String, Object>>::CopyToCopies the elements of the ICollection<T> to an array of type KeyValuePair<TKey, TValue>, starting at the specified array index.
Explicit interface implemetationPrivate propertyICollection<KeyValuePair<String, Object>>::CountGets the number of elements in the ICollection<T>.
Explicit interface implemetationPrivate propertyICollection<KeyValuePair<String, Object>>::IsReadOnlyGets a value indicating whether the ICollection<T> is read-only.
Explicit interface implemetationPrivate methodICollection<KeyValuePair<String, Object>>::RemoveRemoves a key and value from the collection.
Explicit interface implemetationPrivate methodIDictionary<String, Object>::AddAdds the specified key and value to the dictionary.
Explicit interface implemetationPrivate methodIDictionary<String, Object>::ContainsKeyDetermines whether the dictionary contains the specified key.
Explicit interface implemetationPrivate propertyIDictionary<String, Object>::ItemGets or sets the element that has the specified key.
Explicit interface implemetationPrivate propertyIDictionary<String, Object>::KeysGets an ICollection<T> that contains the keys of the IDictionary<TKey, TValue>.
Explicit interface implemetationPrivate methodIDictionary<String, Object>::RemoveRemoves the element that has the specified key from the IDictionary.
Explicit interface implemetationPrivate methodIDictionary<String, Object>::TryGetValueGets the value associated with the specified key.
Explicit interface implemetationPrivate propertyIDictionary<String, Object>::ValuesGets an ICollection<T> that contains the values in the IDictionary<TKey, TValue>.
Explicit interface implemetationPrivate methodIDynamicMetaObjectProvider::GetMetaObjectThe provided MetaObject will dispatch to the dynamic virtual methods. The object can be encapsulated inside another MetaObject to provide custom behavior for individual actions.
Explicit interface implemetationPrivate methodIEnumerable<KeyValuePair<String, Object>>::GetEnumeratorReturns an enumerator that iterates through the collection.
Explicit interface implemetationPrivate methodIEnumerable::GetEnumeratorReturns an enumerator that iterates through the collection.
Explicit interface implemetationPrivate eventINotifyPropertyChanged::PropertyChangedOccurs when a property value changes.
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The ExpandoObject class enables you to add and delete members of its instances at run time and also to set and get values of these members. This class supports dynamic binding, which enables you to use standard syntax like sampleObject.sampleMember instead of more complex syntax like sampleObject.GetAttribute("sampleMember").

The ExpandoObject class implements the standard Dynamic Language Runtime (DLR) interface IDynamicMetaObjectProvider, which enables you to share instances of the ExpandoObject class between languages that support the DLR interoperability model. For example, you can create an instance of the ExpandoObject class in C# and then pass it to an IronPython function. For more information, see Dynamic Language Runtime Overview documentation on the CodePlex Web site, and Introducing the ExpandoObject on the C# Frequently Asked Questions Web site.

The ExpandoObject class is an implementation of the dynamic object concept that enables getting, setting, and invoking members. If you want to define types that have their own dynamic dispatch semantics, use the DynamicObject class. If you want to define how dynamic objects participate in the interoperability protocol and manage DLR fast dynamic dispatch caching, create your own implementation of the IDynamicMetaObjectProvider interface.

Creating an Instance

In C#, to enable late binding for an instance of the ExpandoObject class, you must use the dynamic keyword. For more information, see Using Type dynamic (C# Programming Guide).

In Visual Basic, dynamic operations are supported by late binding. For more information, see Early and Late Binding (Visual Basic).

The following code example demonstrates how to create an instance of the ExpandoObject class.

No code example is currently available or this language may not be supported.

Adding New Members

You can add properties, methods, and events to instances of the ExpandoObject class.

The following code example demonstrates how to add a new property to an instance of the ExpandoObject class.

No code example is currently available or this language may not be supported.

The methods represent lambda expressions that are stored as delegates, which can be invoked when they are needed. The following code example demonstrates how to add a method that increments a value of the dynamic property.

No code example is currently available or this language may not be supported.

The following code example demonstrates how to add an event to an instance of the ExpandoObject class.

No code example is currently available or this language may not be supported.

Passing As a Parameter

You can pass instances of the ExpandoObject class as parameters. Note that these instances are treated as dynamic objects in C# and late-bound objects in Visual Basic. This means that you do not have IntelliSense for object members and you do not receive compiler errors when you call non-existent members. If you call a member that does not exist, an exception occurs.

The following code example demonstrates how you can create and use a method to print the names and values of properties.

No code example is currently available or this language may not be supported.

Enumerating and Deleting Members

The ExpandoObject class implements the IDictionary<String, Object> interface. This enables enumeration of members added to the instance of the ExpandoObject class at run time. This can be useful if you do not know at compile time what members an instance might have.

The following code example shows how you can cast an instance of the ExpandoObject class to the IDictionary<TKey, TValue> interface and enumerate the instance's members.

No code example is currently available or this language may not be supported.

In languages that do not have syntax for deleting members (such as C# and Visual Basic), you can delete a member by implicitly casting an instance of the ExpandoObject to the IDictionary<String, Object> interface and then deleting the member as a key/value pair. This is shown in the following example.

No code example is currently available or this language may not be supported.

Receiving Notifications of Property Changes

The ExpandoObject class implements the INotifyPropertyChanged interface and can raise a PropertyChanged event when a member is added, deleted, or modified. This enables ExpandoObject class integration with Windows Presentation Foundation (WPF) data binding and other environments that require notification about changes in the object content.

The following code example demonstrates how to create an event handler for the PropertyChanged event.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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