c# check if string has any character code example

Example 1: how to cjeck if a string has a word c#

using System;

public class Demo {
   public static void Main() {
      string s = "Together we can do so much!";
      if (s.Contains("much") == true) {
         Console.WriteLine("Word found!");
      } else {
         Console.WriteLine("Word not found!");
      }
   }
}

Example 2: c# check if char is string

if (abc.ToLower().IndexOf('s') != -1) { }