Reverse of a string without using the Reverse function in C#.Net

This is a simple code snippet for reversing a string without using the Reverse function. For example, we have a string "Asp Dot Net"; without using a function, we can reverse it using the code snippet below. Code is given in both C#. This will be helpful to beginners. If you have any queries, please feel free to ask me.

static void ReverseString(string str)

        {
          Console.Write("Original String: {0}", str);

            Console.Write(Environment.NewLine);

            Console.Write("-----------------------");

            Console.Write(Environment.NewLine);

            StringBuilder sb = new StringBuilder();

            for (int i = str.Length - 1; i >= 0; i--)

            {

                sb.Append(str[i]);

            }

            Console.Write("After Reverse String: {0}", sb.ToString());

            Console.ReadKey();

        }

static void Main(string[] args)

        {

             ReverseString("Asp Dot Net");

         }