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MoreEnumerableAssertCountTSource Method (IEnumerableTSource, Int32, FuncInt32, Int32, Exception)
Asserts that a source sequence contains a given count of elements. A parameter specifies the exception to be thrown.

Namespace: MoreLinq
Assembly: MoreLinq (in MoreLinq.dll) Version: 1.4.18916.0 (1.4.18916.839)
Syntax
public static IEnumerable<TSource> AssertCount<TSource>(
	this IEnumerable<TSource> source,
	int count,
	Func<int, int, Exception> errorSelector
)

Parameters

source
Type: System.Collections.GenericIEnumerableTSource
Source sequence.
count
Type: SystemInt32
Count to assert.
errorSelector
Type: SystemFuncInt32, Int32, Exception
Function that returns the Exception object to throw.

Type Parameters

TSource
Type of elements in source sequence.

Return Value

Type: IEnumerableTSource
Returns the original sequence as long it is contains the number of elements specified by count. Otherwise it throws the Exception object returned by calling errorSelector.

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).
Remarks
This operator uses deferred execution and streams its results.
See Also