Mono Documentation

Returns the index of the last occurrence of a specified character within the current instance. [Edit]

public int LastIndexOf (char value, int startIndex)

Parameters

value
A Unicode character to locate. [Edit]
startIndex
A int containing the index in the current instance from which to begin searching. [Edit]

Returns

A int containing the index of the last occurrence of value in the current instance, if found; otherwise, -1. [Edit]

Exceptions

Type Reason
ArgumentNullException value is a null reference. [Edit]
ArgumentOutOfRangeException startIndex is less than zero or greater than the length of the current instance. [Edit]

Type	Reason
ArgumentNullException	value is a null reference. [Edit]
ArgumentOutOfRangeException	startIndex is less than zero or greater than the length of the current instance. [Edit]

Remarks

This method searches for the last occurrence of the specified character between the start of the string and the indicated index.
This method is case-sensitive.
[Edit]

Example

The following example demonstrates the string.LastIndexOf(char) method.

C# Example

using System;
public class StringLastIndexOfTest {
   public static void Main() {
      String str = "aa bb cc dd";
      
      Console.WriteLine( str.LastIndexOf('d', 8) );
      Console.WriteLine( str.LastIndexOf('b', 8) );
   }
}

The output is

-1 4

Requirements