System.Globalization.CultureData.IndexOfTimePart C# (CSharp) Method

		private static int IndexOfTimePart(string format, int startIndex, string timeParts)
		{
			Contract.Assert(startIndex >= 0, "startIndex cannot be negative");
			Contract.Assert(timeParts.IndexOfAny(new char[] { '\'', '\\' }) == -1, "timeParts cannot include quote characters");
			bool inQuote = false;
			for (int i = startIndex; i < format.Length; ++i)
			{
				// See if we have a time Part
				if (!inQuote && timeParts.IndexOf(format[i]) != -1)
				{
					return i;
				}
				switch (format[i])
				{
					case '\\':
						if (i + 1 < format.Length)
						{
							++i;
							switch (format[i])
							{
								case '\'':
								case '\\':
									break;
								default:
									--i; //backup since we will move over this next
									break;
							}
						}
						break;
					case '\'':
						inQuote = !inQuote;
						break;
				}
			}

			return -1;
		}