c# string extension. I like 'like'

StringExtensions.Like

public static bool Like(this string @string, string pattern, char wildcard = '%', bool ignoreCase = true)
{
    pattern = pattern.Replace(wildcard.ToString(), ".*");

    var options = RegexOptions.Singleline | RegexOptions.Compiled; 
    if (ignoreCase) options |= RegexOptions.IgnoreCase;

    var regex = new Regex(pattern, options);

    return regex.IsMatch(@string);
}

var username = "foobar";
username.Like("foo%"); // yep
username.Like("bar%");  // nope
username.Like("%baz"); // nope
username.Like("%bar"); // yep
username.Like("%oob%"); // yep