Reverse string without using any built in function in C#.NET

In many of interviews, interviewers will ask write a program to reverse a string without using any built function. So in this snippet we will see how to reverse a string easily without using any built function or string function.

class StringReverseProgram

      {
          static void Main(string[] args)
          {
              string normalStr = "This is DotNetMirror";
              string reverseStr = string.Empty;
              foreach (char chr in normalStr)
              {
                  reverseStr = chr + reverseStr;
              }
              Console.WriteLine(reverseStr); //Output : rorriMteNtoD si sihT
              Console.ReadKey();
          }
    }

Output:
 rorriMteNtoD si sihT