Regex.Ismatch

*IsMatch(String)
Indicates whether the regular expression specified in the Regex constructor finds a match in the input string.
*IsMatch(String, Int32)
Indicates whether the regular expression specified in the Regex constructor finds a match in the input string beginning at the specified starting position in the string.

*IsMatch(String, String)
Indicates whether the regular expression finds a match in the input string using the regular expression specified in the pattern parameter.

*IsMatch(String, String, RegexOptions)
Indicates whether the regular expression finds a match in the input string, using the regular expression specified in the pattern parameter and the matching options supplied in the options parameter.