using System;

public class Program

{

    public static void Main()

    {

        string strB = "Hello Codebuns.com";

​

        // 1 - Method Signature: int IndexOf(char value);

​

        Console.WriteLine(strB.IndexOf('b')); // 10

​

        Console.WriteLine("\n\n-------------------Separator---------------------\n\n");

        // 2 - Method Signature: int IndexOf(string value);

​

        Console.WriteLine(strB.IndexOf("com")); // 15

​

        Console.WriteLine("\n\n-------------------Separator---------------------\n\n");

        // 3 - Method Signature: int IndexOf(char value, int startIndex);

        Console.WriteLine(strB.IndexOf('C', 1)); // 6

        Console.WriteLine(strB.IndexOf('C', 10)); // -1

​

        Console.WriteLine("\n\n-------------------Separator---------------------\n\n");

        // 4 - Method Signature: int IndexOf(string value, int startIndex);

        Console.WriteLine(strB.IndexOf("Code", 3)); // 6

​

    }

}