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MoreEnumerable.Assert<TSource> Method (IEnumerable<TSource>, Func<TSource, Boolean>)

Asserts that all elements of a sequence meet a given condition otherwise throws an Exception object.

Namespace:  MoreLinq
Assembly:  MoreLinq (in MoreLinq.dll) Version: 2.4.0
Syntax
public static IEnumerable<TSource> Assert<TSource>(
	this IEnumerable<TSource> source,
	Func<TSource, bool> predicate
)

Parameters

source
Type: System.Collections.Generic.IEnumerable<TSource>
Source sequence.
predicate
Type: System.Func<TSource, Boolean>
Function that asserts an element of the source sequence for a condition.

Type Parameters

TSource
Type of elements in source sequence.

Return Value

Type: IEnumerable<TSource>
Returns the original sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable<TSource>. 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).
Exceptions
ExceptionCondition
InvalidOperationExceptionThe input sequence contains an element that does not meet the condition being asserted.
Remarks
This operator uses deferred execution and streams its results.
See Also