The correct regular expression formulation of the glob expression d* is ^d, which means match anything that starts with d.
string input = "Message"; string pattern = @"^d"; Regex regex = new Regex(pattern, RegexOptions.IgnoreCase);(The @ quoting is not necessary in this case, but good practice since many regexes use backslash escapes that need to be left alone, and it also indicates to the reader that this string is special).
