using System;
using System.Text;
using System.Text.RegularExpressions;
 
 
namespace Test
{
  class Test
  {
    static void Main()
    {
      string s0 = @"Public Class Class1
    Public Sub New()
        ''asdasdas
        Dim a As String = """" REM asdasd
        ''' asd ad asd
    End Sub
 
 
    Public Sub New(ByVal strg As String)
 
        Dim a As String = ""Name='Soham'""
 
        Dim b As Boolean = True ' a ""line ending"" comment
 
    End Sub
 
 
End Class";
      string r1 = @"(?m)^[ \t]*(?:(?:REM|')[^\r\n]*)?[\r\n]+";
      string r2 = @"(?mn)^(?<line>[^\r\n""R']*((""[^""]*""|(?!REM)R)[^\r\n""R']*)*)(REM|')[^\r\n]*";
      Console.WriteLine(s0);
      string s1 = Regex.Replace(s0, r1, String.Empty);
      s1 = Regex.Replace(s1, r2, @"${line}");
      Console.WriteLine("\n\n{0}", s1);
    }
  }
}

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