Product Key

This function can be used for various tasks but I happen to use it to make product keys cleaner or easier to read.

public static string sProductKey(string sRawText, int nLength)
        {
            string sFinal = "";
            for (int i = 0; i <= sRawText.Length; i += nLength)
                {
                    if (i + nLength < sRawText.Length)
                        {
                            sFinal += sRawText.Substring(i, nLength) + "-";
                        }
                    else
                        {
                            sFinal += sRawText.Substring(i);
                        }
                }
           return sFinal;
        }

Console.WriteLine(sProductKey("ABCDEFGHIJKLMNOPQRSTUVWXY", 5));

Before: ABCDEFGHIJKLMNOPQRSTUVWXY
After: ABCDE-FGHIJ-KLMNO-PQRST-UVWXY