SplitString and InsertNewLine

InsertNewLine.cs

public static string InsertNewLine(string source, int len = 76)
{
	var sb = new StringBuilder(source.Length + (int)(source.Length / len) + 1);
	var start = 0;
	while ((start + len) < source.Length)
	{
		sb.Append(source.Substring(start, len));
		sb.Append(Environment.NewLine);
		start += len;
	}
	sb.Append(source.Substring(start));
	return sb.ToString();
}