Introduction
I have used Visual Studio 2012 for debugging purpose. But you can use any version of visul studio as per your availability..
using System; public class Stringexercise { public static void Main() { string str1, str2; bool m; Console.Write("Enter the string : "); str1 = Console.ReadLine(); Console.Write("Input the substring to search : "); str2 = Console.ReadLine(); m = str1.Contains(str2); if (m) // check boolean value is true or false. Console.WriteLine("The substring exists in the string."); else Console.WriteLine("The substring is not exists in the string."); Console.ReadLine(); } }