using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Searching a string inside a string in C#\n");

        string baseString = "Searching a string";

        string subString = "str";

        int iWhere = baseString.IndexOf(subString);

        Console.WriteLine("Occurred at : " + iWhere + " position");

    }

}