System.StringExtensions static class StringExtensions Documentation Code public sealed class <G>$34505F560D9EACF86A87F3ED1F85E448 public static int IndexOf(this string text, char value, StringComparison comparisonType) public static string Join(char separator, string[] value) public static string Join(char separator, IEnumerable<string> value) public static string Join(char separator, string[] value, int startIndex, int count)