ObjectCache Class

Represents an object cache and provides the base methods and properties for accessing the object cache.

System.Object
  System.Runtime.Caching.ObjectCache
    System.Runtime.Caching.MemoryCache

Namespace:  System.Runtime.Caching
Assembly:  System.Runtime.Caching (in System.Runtime.Caching.dll)

public abstract class ObjectCache : IEnumerable<KeyValuePair<string, Object>>, 
	IEnumerable

The ObjectCache type exposes the following members.

  NameDescription
Protected methodObjectCacheCalled from constructors in derived classes in order to initialize the ObjectCache class.
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  NameDescription
Public propertyDefaultCacheCapabilitiesWhen overridden in a derived class, gets a description of the features that a cache implementation provides.
Public propertyStatic memberHostGets or set a reference to a managed hosting environment that is available to ObjectCache implementations and that can provide host-specific services to ObjectCache implementations.
Public propertyItemGets or sets the default indexer for the ObjectCache class.
Public propertyNameGets the name of a specific ObjectCache instance.
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  NameDescription
Public methodAdd(CacheItem, CacheItemPolicy)When overridden in a derived class, tries to insert a cache entry into the cache as a CacheItem instance, and adds details about how the entry should be evicted.
Public methodAdd(String, Object, DateTimeOffset, String)When overridden in a derived class, inserts a cache entry into the cache without overwriting any existing cache entry.
Public methodAdd(String, Object, CacheItemPolicy, String)When overridden in a derived class, inserts a cache entry into the cache, specifying information about how the entry will be evicted.
Public methodAddOrGetExisting(CacheItem, CacheItemPolicy)When overridden in a derived class, inserts the specified CacheItem object into the cache, specifying information about how the entry will be evicted.
Public methodAddOrGetExisting(String, Object, DateTimeOffset, String)When overridden in a derived class, inserts a cache entry into the cache, by using a key, an object for the cache entry, an absolute expiration value, and an optional region to add the cache into.
Public methodAddOrGetExisting(String, Object, CacheItemPolicy, String)When overridden in a derived class, inserts a cache entry into the cache, specifying a key and a value for the cache entry, and information about how the entry will be evicted.
Public methodContainsWhen overridden in a derived class, checks whether the cache entry already exists in the cache.
Public methodCreateCacheEntryChangeMonitorWhen overridden in a derived class, creates a CacheEntryChangeMonitor object that can trigger events in response to changes to specified cache entries.
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 methodGetWhen overridden in a derived class, gets the specified cache entry from the cache as an object.
Public methodGetCacheItemWhen overridden in a derived class, gets the specified cache entry from the cache as a CacheItem instance.
Public methodGetCountWhen overridden in a derived class, gets the total number of cache entries in the cache.
Protected methodGetEnumeratorWhen overridden in a derived class, creates an enumerator that can be used to iterate through a collection of cache entries.
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodGetValues(IEnumerable<String>, String)When overridden in a derived class, gets a set of cache entries that correspond to the specified keys.
Public methodGetValues(String, String[])Gets a set of cache entries that correspond to the specified keys.
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodRemoveWhen overridden in a derived class, removes the cache entry from the cache.
Public methodSet(CacheItem, CacheItemPolicy)When overridden in a derived class, inserts the cache entry into the cache as a CacheItem instance, specifying information about how the entry will be evicted.
Public methodSet(String, Object, DateTimeOffset, String)When overridden in a derived class, inserts a cache entry into the cache, specifying time-based expiration details.
Public methodSet(String, Object, CacheItemPolicy, String)When overridden in a derived class, inserts a cache entry into the cache.
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
Public fieldStatic memberInfiniteAbsoluteExpirationGets a value that indicates that a cache entry has no absolute expiration.
Public fieldStatic memberNoSlidingExpirationIndicates that a cache entry has no sliding expiration time.
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  NameDescription
Explicit interface implemetationPrivate methodIEnumerable<KeyValuePair<String, Object>>.GetEnumeratorSupports iteration over a strongly typed collection.
Explicit interface implemetationPrivate methodIEnumerable.GetEnumeratorSupports iteration over a generic collection.
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The ObjectCache type is the primary type for the in-memory object cache. To develop a custom cache implementation, you derive from the ObjectCache class.

NoteNote

The ObjectCache class is new as of the .NET Framework 4.

The built-in MemoryCache class derives from the ObjectCache class. The MemoryCache class is the only concrete object cache implementation in the .NET Framework 4 that derives from the ObjectCache class.

Notes to Inheritors

Because the ObjectCache type represents only common cache functions, there is no requirement for how an ObjectCache instance must be instantiated and obtained. In addition, there is no requirement that concrete implementations of the ObjectCache class must be singletons.

NoteNote

MemoryCache is not a singleton, but you should create only a few or potentially only one MemoryCache instance and code that caches items should use those instances.

When you inherit from the ObjectCache class, you must override its methods.

Important noteImportant

All implementations of the ObjectCache class should disallow null as a value for cached data. This helps avoid confusion between null as a data value and a cache entry that was not found.

.NET Framework

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.

This type is thread safe.

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