C#

ESC [ n ; n x

ESC is Hex 1B
[   is [
n   is a number, in ASCII digits: '0' (hex 30) to '9' (hex 39) repeated
;   is ;
x   is a command code which tells the terminal what to do

\x1B\[\??\d+(;\d+)?[a-zA-Z]

Regexp::Common::ANSIescape

\x1BE/\n

\[[0-9]+;[0-9]+H

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace ProcurevAnsiFilter {
  class Program {
    const string CHAR_STR    = @"(.|\n)*?";

    const string CSI_7BIT    = @"\x1B\\\x5B";
    const string CSI_8BIT    = @"\x9B";

    const string CSI_7OR8    = @"(?:" + CSI_7BIT + "|" + CSI_8BIT + ")";

    const string C1_NST_8BIT = @"[\x80-\x8F\x91-\x97\x99\x9A\x9C]";
    const string C1_NST_7BIT = @"\x1B[\x40-\x4F\x51-\x57\x59\x5A\\\x5C]";

    const string C1_STR_7BIT = @"\x1B[\x5D\x50\x58\x5E\x5F]";
    const string C1_STR_8BIT = @"[\x9D\x90\x98\x9E\x9F]";

    const string C1_STR_7OR8 = @"(?:" + C1_STR_7BIT + "|" + C1_STR_8BIT + ")";

    const string ST_7BIT     = @"\x1B\\\\";
    const string ST_8BIT     = @"\x9C";
    const string ST_7OR8     = @"(?:" + ST_7BIT     + "|" + ST_8BIT     + ")";


    static void Main(string[] args) {
    string[] tmp = new string[] {
      @"(?:[\x30-\x3F]*)(?:[\x20-\x2F]*[\x40-\x7E])",
      C1_NST_7BIT,
      C1_NST_8BIT,
      C1_STR_7OR8 + CHAR_STR + ST_7OR8
    };
      string regex = "(?:" + string.Join("|", tmp) + ")";

      Regex reg = new Regex(regex);
    }
  }
}

V. wrote:

although I believe the latest ones will run the previous ones as well

Backward compatibility and the .NET Framework 4.5:

The .NET Framework 4.5 and its point releases are backward-compatible with apps that were built with earlier versions of the .NET Framework.

In other words, apps and components built with previous versions will work without modification on the .NET Framework 4.5.

However, by default, apps run on the version of the common language runtime for which they were developed, so you may have to provide a configuration file to enable your app to run on the .NET Framework 4.5.