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ListTIndexOf Method (T, Int32, Int32)
Searches for the specified object and returns the zero-based index of the first occurrence within the range of elements in the ListT that starts at the specified index and contains the specified number of elements.

Namespace: System.Collections.Generic
Assembly: mscorlib (in mscorlib.dll) Version: 4.0.0.0
Syntax
C#
Copy
public int IndexOf(
	T item,
	int index,
	int count
)

Parameters

item
Type: T
The object to locate in the ListT. The value can be null for reference types.
index
Type: SystemInt32
The zero-based starting index of the search. 0 (zero) is valid in an empty list.
count
Type: SystemInt32
The number of elements in the section to search.

Return Value

Type: Int32
The zero-based index of the first occurrence of item within the range of elements in the ListT that starts at index and contains count number of elements, if found; otherwise, –1.
Exceptions
See Also