Split WEBVTT with string input.

SplitWEBVTT.cs

/// <summary>
/// Split WEBVTT with string input.
/// </summary>
/// <param name="input"></param>
/// <param name="linefeed"></param>
/// <returns> content </returns>
public static string SplitWEBVTT(string input ,bool linefeed){
  string content = "";
  string linefeedtext = linefeed? "\r\n\r\n" : "\r\n";
  foreach(var myString in input.Split("\r\n".ToCharArray(),StringSplitOptions.RemoveEmptyEntries)){
    if(myString.Contains("-->")){
      continue;
    }
    content+= myString + linefeedtext;
  }
  return content;
}