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: 2.7.0
Syntax public static IEnumerable<TSource> AssertCount<TSource>(
this IEnumerable<TSource> source,
int count,
Func<int, int, Exception> errorSelector
)
<ExtensionAttribute>
Public Shared Function AssertCount(Of TSource) (
source As IEnumerable(Of TSource),
count As Integer,
errorSelector As Func(Of Integer, Integer, Exception)
) As IEnumerable(Of TSource)
public:
[ExtensionAttribute]
generic<typename TSource>
static IEnumerable<TSource>^ AssertCount(
IEnumerable<TSource>^ source,
int count,
Func<int, int, Exception^>^ errorSelector
)
[<ExtensionAttribute>]
static member AssertCount :
source : IEnumerable<'TSource> *
count : int *
errorSelector : Func<int, int, Exception> -> IEnumerable<'TSource>
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