Bits of .NET

trim() function does NOT remove “all whitespace characters” of your string. So instead of trim(), you can use String.Replace method:

string str = "C Sharp";
str = str.Replace(" ", "");

OUTPUT: CSharp

or if you want to remove all whitespace characters (space, tabs, line breaks…)

string str = "C Sharp";
str = Regex.Replace(str, @"\s", "");

OUTPUT: CSharp