Find the given character is lower or upper case using c#.net?

          string Words = "Adi Dotnet";

            char[] chars = Words.ToCharArray();

            for (int i = 0; i < chars.Length; i++)

            {

                char c = chars;

                if (Char.IsLetter(c))

                {

                    if (Char.IsLower(c))

                    {

                        Response.Write(c + " is lowercase"+"<br>");

                    }

                    else if (Char.IsUpper(c))

                    {

                        Response.Write(c + " is uppercase" + "<br>");

                    }

                }

            }