How to Combine Regex Lines into Single Regex to Remove Space and . in C#

How can I combine the following Regex into a single one to remove all spaces and periods in the file? I figured out how to replace a single char, but not multiple characters in a single line.

    开发者_开发问答    string testfile = @"C:\test\work\A Nightmare.On.Elm Street 1984.720p.BRRip.nfo";
        testfile = testfile.Substring(0, testfile.Length - 4);
        testfile = Regex.Replace(testfile, @"\.", "");
        testfile = Regex.Replace(testfile, @"\s", "");

Thanks!

The regex to use is @"[\s\.]"

testfile = Regex.Replace(testfile, @"[\s\.]", "");

Try this:

testfile = Regex.Replace(testfile, @"[.\s]", "");