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EnumerableExExpandTSource Method
Expands the sequence by recursively applying a selector function.

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

Parameters

source
Type: System.Collections.GenericIEnumerableTSource
Source sequence.
selector
Type: SystemFuncTSource, IEnumerableTSource
Selector function to retrieve the next sequence to expand.

Type Parameters

TSource
Source sequence element type.

Return Value

Type: IEnumerableTSource
Sequence with results from the recursive expansion of 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