Answer by Gabe for Need to perform Wildcard (*,?, etc) search on a string using Regex

From http://www.codeproject.com/KB/recipes/wildcardtoregex.aspx:

public static string WildcardToRegex(string pattern){    return "^"+ Regex.Escape(pattern)                      .Replace(@"\*", ".*")                      .Replace(@"\?", ".")+"$";}

So something like foo*.xls? will get transformed to ^foo.*\.xls.$.