Left, Right and Mid functions in C#

I started as a VB programmer and I must say that i miss using Left, Right and Mid methods since it is not included in C#. But then again, there is always a suitable replacement. The Substring method.

The Substring method retrieves a substring from a specified string. In this demo i have decided to show how to use the substring method to create the Left, Right and Mid functions.

namespace LeftRightMid
{
    /// <summary>
    /// Summary description for Class1.
    /// </summary>
    class LeftRightMid
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            
            //assign a value to our string
            string myString = "This is a string";
            //get 4 characters starting from the left
            Console.WriteLine(Left(myString,4));
            //get 6 characters starting from the right
            Console.WriteLine(Right(myString,6));
            //get 4 characters starting at index 5 of the string
            Console.WriteLine(Mid(myString,5,4));
            //get the characters from index 5 up to the end of the string
            Console.WriteLine(Mid(myString,5));
            //display the result to the screen
            Console.ReadLine();
        }

        public static string Left(string param, int length)
        {
            //we start at 0 since we want to get the characters starting from the
            //left and with the specified lenght and assign it to a variable
            string result = param.Substring(0, length);
            //return the result of the operation
            return result;
        }
        public static string Right(string param, int length)
        {
            //start at the index based on the lenght of the sting minus
            //the specified lenght and assign it a variable
            string result = param.Substring(param.Length - length, length);
            //return the result of the operation
            return result;
        }

        public static string Mid(string param,int startIndex, int length)
        {
            //start at the specified index in the string ang get N number of
            //characters depending on the lenght and assign it to a variable
            string result = param.Substring(startIndex, length);
            //return the result of the operation
            return result;
        }

        public static string Mid(string param,int startIndex)
        {
            //start at the specified index and return all characters after it
            //and assign it to a variable
            string result = param.Substring(startIndex);
            //return the result of the operation
            return result;
        }

    }
}

Here is the result of the program.