public string IDGenerator()
        {
            // Create random ID that look like- '000-000-000'.
            string id   = "";
            int    num1 = LocalLibrary.GetNumber();

            id = id + num1;
            int num2 = LocalLibrary.GetNumber();

            id = id + num2;
            int num3 = LocalLibrary.GetNumber();

            id = id + num3;
            id = id + "-";
            int num4 = LocalLibrary.GetNumber();

            id = id + num4;
            int num5 = LocalLibrary.GetNumber();

            id = id + num5;
            int num6 = LocalLibrary.GetNumber();

            id = id + num6;
            id = id + "-";
            int num7 = LocalLibrary.GetNumber();

            id = id + num7;
            int num8 = LocalLibrary.GetNumber();

            id = id + num8;
            int num9 = LocalLibrary.GetNumber();

            id = id + num9;
            return(id);
        }
        public string IDGenerator()
        {
            // Create random ID that look like- 'AA-00000000'.
            string id = "";
            // Generates a key.
            char c1 = LocalLibrary.GetLetter();

            id = id + c1;
            char c2 = LocalLibrary.GetLetter();

            id = id + c2;
            id = id + "-";
            // Generates the numbers.
            int num1 = LocalLibrary.GetNumber();

            id = id + num1;
            int num2 = LocalLibrary.GetNumber();

            id = id + num2;
            int num3 = LocalLibrary.GetNumber();

            id = id + num3;
            int num4 = LocalLibrary.GetNumber();

            id = id + num4;
            int num5 = LocalLibrary.GetNumber();

            id = id + num5;
            int num6 = LocalLibrary.GetNumber();

            id = id + num6;
            int num7 = LocalLibrary.GetNumber();

            id = id + num7;
            int num8 = LocalLibrary.GetNumber();

            id = id + num8;
            return(id);
        }