ReadOnlyDictionary<TKey, TValue>::KeyCollection Class
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Represents a read-only collection of the keys of a ReadOnlyDictionary<TKey, TValue> object.
Assembly: mscorlib (in mscorlib.dll)
The ReadOnlyDictionary<TKey, TValue>::KeyCollection generic type exposes the following members.
| Name | Description | |
|---|---|---|
 | CopyTo | Copies the elements of the collection to an array, starting at a particular array index. |
| Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.) |
| GetEnumerator | Returns an enumerator that iterates through the collection. |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
|---|---|---|
 | Aggregate<TKey>(Func<TKey, TKey, TKey>) | Overloaded. Applies an accumulator function over a sequence. (Defined by Enumerable.) |
| Aggregate<TKey, TAccumulate>(TAccumulate, Func<TAccumulate, TKey, TAccumulate>) | Overloaded. Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value. (Defined by Enumerable.) |
| Aggregate<TKey, TAccumulate, TResult>(TAccumulate, Func<TAccumulate, TKey, 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.) |
| All<TKey> | Determines whether all elements of a sequence satisfy a condition. (Defined by Enumerable.) |
| Any<TKey>() | Overloaded. Determines whether a sequence contains any elements. (Defined by Enumerable.) |
| Any<TKey>(Func<TKey, Boolean>) | Overloaded. Determines whether any element of a sequence satisfies a condition. (Defined by Enumerable.) |
| AsEnumerable<TKey> | Returns the input typed as IEnumerable<T>. (Defined by Enumerable.) |
| AsQueryable() | Overloaded. Converts an IEnumerable to an IQueryable. (Defined by Queryable.) |
| AsQueryable<TKey>() | Overloaded. Converts a generic IEnumerable<T> to a generic IQueryable<T>. (Defined by Queryable.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Average<TKey>(Func<TKey, 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.) |
| Cast<TResult> | Converts the elements of an IEnumerable to the specified type. (Defined by Enumerable.) |
| Concat<TKey> | Concatenates two sequences. (Defined by Enumerable.) |
| Contains<TKey>(TKey) | Overloaded. Determines whether a sequence contains a specified element by using the default equality comparer. (Defined by Enumerable.) |
| Contains<TKey>(TKey, IEqualityComparer<TKey>) | Overloaded. Determines whether a sequence contains a specified element by using a specified IEqualityComparer<T>. (Defined by Enumerable.) |
| Count<TKey>() | Overloaded. Returns the number of elements in a sequence. (Defined by Enumerable.) |
| Count<TKey>(Func<TKey, Boolean>) | Overloaded. Returns a number that represents how many elements in the specified sequence satisfy a condition. (Defined by Enumerable.) |
| DefaultIfEmpty<TKey>() | 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.) |
| DefaultIfEmpty<TKey>(TKey) | Overloaded. Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty. (Defined by Enumerable.) |
| Distinct<TKey>() | Overloaded. Returns distinct elements from a sequence by using the default equality comparer to compare values. (Defined by Enumerable.) |
| Distinct<TKey>(IEqualityComparer<TKey>) | Overloaded. Returns distinct elements from a sequence by using a specified IEqualityComparer<T> to compare values. (Defined by Enumerable.) |
| ElementAt<TKey> | Returns the element at a specified index in a sequence. (Defined by Enumerable.) |
| ElementAtOrDefault<TKey> | Returns the element at a specified index in a sequence or a default value if the index is out of range. (Defined by Enumerable.) |
| Except<TKey>(IEnumerable<TKey>) | Overloaded. Produces the set difference of two sequences by using the default equality comparer to compare values. (Defined by Enumerable.) |
| Except<TKey>(IEnumerable<TKey>, IEqualityComparer<TKey>) | Overloaded. Produces the set difference of two sequences by using the specified IEqualityComparer<T> to compare values. (Defined by Enumerable.) |
| First<TKey>() | Overloaded. Returns the first element of a sequence. (Defined by Enumerable.) |
| First<TKey>(Func<TKey, Boolean>) | Overloaded. Returns the first element in a sequence that satisfies a specified condition. (Defined by Enumerable.) |
| FirstOrDefault<TKey>() | Overloaded. Returns the first element of a sequence, or a default value if the sequence contains no elements. (Defined by Enumerable.) |
| FirstOrDefault<TKey>(Func<TKey, 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.) |
| GroupBy<TKey, TKey>(Func<TKey, TKey>) | Overloaded. Groups the elements of a sequence according to a specified key selector function. (Defined by Enumerable.) |
| GroupBy<TKey, TKey>(Func<TKey, 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.) |
| GroupBy<TKey, TKey, TElement>(Func<TKey, TKey>, Func<TKey, 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.) |
| GroupBy<TKey, TKey, TResult>(Func<TKey, TKey>, Func<TKey, IEnumerable<TKey>, 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.) |
| GroupBy<TKey, TKey, TElement>(Func<TKey, TKey>, Func<TKey, 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.) |
| GroupBy<TKey, TKey, TResult>(Func<TKey, TKey>, Func<TKey, IEnumerable<TKey>, 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.) |
| GroupBy<TKey, TKey, TElement, TResult>(Func<TKey, TKey>, Func<TKey, 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.) |
| GroupBy<TKey, TKey, TElement, TResult>(Func<TKey, TKey>, Func<TKey, 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.) |
| GroupJoin<TKey, TInner, TKey, TResult>(IEnumerable<TInner>, Func<TKey, TKey>, Func<TInner, TKey>, Func<TKey, 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.) |
| GroupJoin<TKey, TInner, TKey, TResult>(IEnumerable<TInner>, Func<TKey, TKey>, Func<TInner, TKey>, Func<TKey, 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.) |
| Intersect<TKey>(IEnumerable<TKey>) | Overloaded. Produces the set intersection of two sequences by using the default equality comparer to compare values. (Defined by Enumerable.) |
| Intersect<TKey>(IEnumerable<TKey>, IEqualityComparer<TKey>) | Overloaded. Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values. (Defined by Enumerable.) |
| Join<TKey, TInner, TKey, TResult>(IEnumerable<TInner>, Func<TKey, TKey>, Func<TInner, TKey>, Func<TKey, 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.) |
| Join<TKey, TInner, TKey, TResult>(IEnumerable<TInner>, Func<TKey, TKey>, Func<TInner, TKey>, Func<TKey, 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.) |
| Last<TKey>() | Overloaded. Returns the last element of a sequence. (Defined by Enumerable.) |
| Last<TKey>(Func<TKey, Boolean>) | Overloaded. Returns the last element of a sequence that satisfies a specified condition. (Defined by Enumerable.) |
| LastOrDefault<TKey>() | Overloaded. Returns the last element of a sequence, or a default value if the sequence contains no elements. (Defined by Enumerable.) |
| LastOrDefault<TKey>(Func<TKey, 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.) |
| LongCount<TKey>() | Overloaded. Returns an Int64 that represents the total number of elements in a sequence. (Defined by Enumerable.) |
| LongCount<TKey>(Func<TKey, Boolean>) | Overloaded. Returns an Int64 that represents how many elements in a sequence satisfy a condition. (Defined by Enumerable.) |
| Max<TKey>() | Overloaded. Returns the maximum value in a generic sequence. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Decimal>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Decimal value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Nullable<Decimal>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Double>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Double value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Nullable<Double>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Double value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Int32>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Int32 value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Int64>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Int64 value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Nullable<Int32>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Nullable<Int64>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Nullable<Single>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Single value. (Defined by Enumerable.) |
| Max<TKey>(Func<TKey, Single>) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Single value. (Defined by Enumerable.) |
| Max<TKey, TResult>(Func<TKey, TResult>) | Overloaded. Invokes a transform function on each element of a generic sequence and returns the maximum resulting value. (Defined by Enumerable.) |
| Min<TKey>() | Overloaded. Returns the minimum value in a generic sequence. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Decimal>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Decimal value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Nullable<Decimal>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Double>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Double value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Nullable<Double>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Double value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Int32>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Int32 value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Int64>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Int64 value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Nullable<Int32>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Nullable<Int64>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Nullable<Single>>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Single value. (Defined by Enumerable.) |
| Min<TKey>(Func<TKey, Single>) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Single value. (Defined by Enumerable.) |
| Min<TKey, TResult>(Func<TKey, TResult>) | Overloaded. Invokes a transform function on each element of a generic sequence and returns the minimum resulting value. (Defined by Enumerable.) |
| OfType<TResult> | Filters the elements of an IEnumerable based on a specified type. (Defined by Enumerable.) |
| OrderBy<TKey, TKey>(Func<TKey, TKey>) | Overloaded. Sorts the elements of a sequence in ascending order according to a key. (Defined by Enumerable.) |
| OrderBy<TKey, TKey>(Func<TKey, TKey>, IComparer<TKey>) | Overloaded. Sorts the elements of a sequence in ascending order by using a specified comparer. (Defined by Enumerable.) |
| OrderByDescending<TKey, TKey>(Func<TKey, TKey>) | Overloaded. Sorts the elements of a sequence in descending order according to a key. (Defined by Enumerable.) |
| OrderByDescending<TKey, TKey>(Func<TKey, TKey>, IComparer<TKey>) | Overloaded. Sorts the elements of a sequence in descending order by using a specified comparer. (Defined by Enumerable.) |
| Reverse<TKey> | Inverts the order of the elements in a sequence. (Defined by Enumerable.) |
| Select<TKey, TResult>(Func<TKey, TResult>) | Overloaded. Projects each element of a sequence into a new form. (Defined by Enumerable.) |
| Select<TKey, TResult>(Func<TKey, Int32, TResult>) | Overloaded. Projects each element of a sequence into a new form by incorporating the element's index. (Defined by Enumerable.) |
| SelectMany<TKey, TResult>(Func<TKey, IEnumerable<TResult>>) | Overloaded. Projects each element of a sequence to an IEnumerable<T> and flattens the resulting sequences into one sequence. (Defined by Enumerable.) |
| SelectMany<TKey, TResult>(Func<TKey, 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.) |
| SelectMany<TKey, TCollection, TResult>(Func<TKey, IEnumerable<TCollection>>, Func<TKey, 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.) |
| SelectMany<TKey, TCollection, TResult>(Func<TKey, Int32, IEnumerable<TCollection>>, Func<TKey, 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.) |
| SequenceEqual<TKey>(IEnumerable<TKey>) | Overloaded. Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type. (Defined by Enumerable.) |
| SequenceEqual<TKey>(IEnumerable<TKey>, IEqualityComparer<TKey>) | Overloaded. Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>. (Defined by Enumerable.) |
| Single<TKey>() | 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.) |
| Single<TKey>(Func<TKey, 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.) |
| SingleOrDefault<TKey>() | 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.) |
| SingleOrDefault<TKey>(Func<TKey, 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.) |
| Skip<TKey> | Bypasses a specified number of elements in a sequence and then returns the remaining elements. (Defined by Enumerable.) |
| SkipWhile<TKey>(Func<TKey, Boolean>) | Overloaded. Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. (Defined by Enumerable.) |
| SkipWhile<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Sum<TKey>(Func<TKey, 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.) |
| Take<TKey> | Returns a specified number of contiguous elements from the start of a sequence. (Defined by Enumerable.) |
| TakeWhile<TKey>(Func<TKey, Boolean>) | Overloaded. Returns elements from a sequence as long as a specified condition is true. (Defined by Enumerable.) |
| TakeWhile<TKey>(Func<TKey, 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.) |
| ToArray<TKey> | Creates an array from a IEnumerable<T>. (Defined by Enumerable.) |
| ToDictionary<TKey, TKey>(Func<TKey, TKey>) | Overloaded. Creates a Dictionary<TKey, TValue> from an IEnumerable<T> according to a specified key selector function. (Defined by Enumerable.) |
| ToDictionary<TKey, TKey>(Func<TKey, 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.) |
| ToDictionary<TKey, TKey, TElement>(Func<TKey, TKey>, Func<TKey, TElement>) | Overloaded. Creates a Dictionary<TKey, TValue> from an IEnumerable<T> according to specified key selector and element selector functions. (Defined by Enumerable.) |
| ToDictionary<TKey, TKey, TElement>(Func<TKey, TKey>, Func<TKey, 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.) |
| ToList<TKey> | Creates a List<T> from an IEnumerable<T>. (Defined by Enumerable.) |
| ToLookup<TKey, TKey>(Func<TKey, TKey>) | Overloaded. Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to a specified key selector function. (Defined by Enumerable.) |
| ToLookup<TKey, TKey>(Func<TKey, 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.) |
| ToLookup<TKey, TKey, TElement>(Func<TKey, TKey>, Func<TKey, TElement>) | Overloaded. Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to specified key selector and element selector functions. (Defined by Enumerable.) |
| ToLookup<TKey, TKey, TElement>(Func<TKey, TKey>, Func<TKey, 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.) |
| Union<TKey>(IEnumerable<TKey>) | Overloaded. Produces the set union of two sequences by using the default equality comparer. (Defined by Enumerable.) |
| Union<TKey>(IEnumerable<TKey>, IEqualityComparer<TKey>) | Overloaded. Produces the set union of two sequences by using a specified IEqualityComparer<T>. (Defined by Enumerable.) |
| Where<TKey>(Func<TKey, Boolean>) | Overloaded. Filters a sequence of values based on a predicate. (Defined by Enumerable.) |
| Where<TKey>(Func<TKey, 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.) |
| Zip<TKey, TSecond, TResult> | Merges two sequences by using the specified predicate function. (Defined by Enumerable.) |
| Name | Description | |
|---|---|---|
  | ICollection<TKey>::Add | Throws a NotSupportedException exception in all cases. |
| ICollection<TKey>::Clear | Throws a NotSupportedException exception in all cases. |
| ICollection<TKey>::Contains | Determines whether the collection contains a specific value. |
| ICollection::CopyTo | Copies the elements of the collection to an array, starting at a particular array index. |
 | ICollection<TKey>::IsReadOnly | Gets a value that indicates whether the collection is read-only. |
| ICollection::IsSynchronized | Gets a value that indicates whether access to the collection is synchronized (thread safe). |
| ICollection<TKey>::Remove | Throws a NotSupportedException exception in all cases. |
| ICollection::SyncRoot | Gets an object that can be used to synchronize access to the collection. |
| IEnumerable::GetEnumerator | Returns an enumerator that iterates through the collection. |
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