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EnumerableExMemoizeTSource, TResult Method (IEnumerableTSource, FuncIEnumerableTSource, IEnumerableTResult)
Memoizes the source sequence within a selector function where each enumerator can get access to all of the sequence's elements without causing multiple enumerations over the source.

Namespace: System.Linq
Assembly: System.Interactive (in System.Interactive.dll) Version: 1.2.0.0
Syntax
C#
Copy
public static IEnumerable<TResult> Memoize<TSource, TResult>(
	this IEnumerable<TSource> source,
	Func<IEnumerable<TSource>, IEnumerable<TResult>> selector
)

Parameters

source
Type: System.Collections.GenericIEnumerableTSource
Source sequence.
selector
Type: SystemFuncIEnumerableTSource, IEnumerableTResult
Selector function with memoized access to the source sequence for each enumerator.

Type Parameters

TSource
Source sequence element type.
TResult
Result sequence element type.

Return Value

Type: IEnumerableTResult
Sequence resulting from applying the selector function to the memoized view over the source sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
See Also