Calculator Button

// description of your code here


            if (onFirst)
            {
                int length; // length of word
                length = (myCalculator.First).Length;

                if (myCalculator.First == "0")
                {
                    //do nothing
                }
                else if (length == 1 && (myCalculator.First != "0"))
                {
                    myCalculator.First = "0";
                    
                }
                else
                {
                    myCalculator.First = (myCalculator.First).Substring(0, length - 1);
                }
                label1.Text = myCalculator.First;
            }