Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the first occurrence within the range of elements in the List that starts at the specified index and contains the specified number of elements.

'Declaration
 
Public Overloads Function FindIndex(Of TTarget As T)( _
   ByVal startIndex As Integer, _
   ByVal count As Integer, _
   ByVal match As Predicate(Of TTarget) _
) As Integer

'Usage
 
Dim instance As CollectionBase(Of T)
Dim startIndex As Integer
Dim count As Integer
Dim match As Predicate(Of TTarget)
Dim value As Integer
 
value = instance.FindIndex(Of TTarget)(startIndex, count, match)

public int FindIndex<TTarget>( 
   int startIndex,
   int count,
   Predicate<TTarget> match
)
where TTarget: T