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
)