[c#] Is there an easy way to check the .NET Framework version?

I find it easier to work with the Version class:

using Microsoft.Win32;
using System.Runtime.InteropServices;

namespace System.Runtime.InteropServices {
  public static class RuntimeInformationEx {

    public static Version? GetDotnetFrameworkVersion() {
      using var key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full");
      if (key is object) {
        if (!Int32.TryParse(key.GetValue("Release", "").ToString(), out var release)) return null;
        return release switch
        {
          378389 => new Version(4, 5, 0),
          378675 => new Version(4, 5, 1),
          378758 => new Version(4, 5, 1),
          379893 => new Version(4, 5, 2),
          393295 => new Version(4, 6, 0),
          393297 => new Version(4, 6, 0),
          394254 => new Version(4, 6, 1),
          394271 => new Version(4, 6, 1),
          394802 => new Version(4, 6, 2),
          394806 => new Version(4, 6, 2),
          460798 => new Version(4, 7, 0),
          460805 => new Version(4, 7, 0),
          461308 => new Version(4, 7, 1),
          461310 => new Version(4, 7, 1),
          461808 => new Version(4, 7, 2),
          461814 => new Version(4, 7, 2),
          528040 => new Version(4, 8, 0),
          528209 => new Version(4, 8, 0),
          528049 => new Version(4, 8, 0),
          _ => null
        };

      } else { // .NET version < 4.5
        using var key1 = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\NET Framework Setup\NDP");
        if (key1 is null) return null;
        var parts = key1.GetSubKeyNames()[^1].Substring(1).Split('.'); // get lastsub key, remove 'v' prefix, and split
        if (parts.Length == 2) parts = new string[] { parts[0], parts[1], "0" };
        if (parts.Length != 3) return null;
        Func<string, int> Parse = s => Int32.TryParse(s, out var i) ? i : -1;
        try { return new Version(Parse(parts[0]), Parse(parts[1]), Parse(parts[2])); } catch { return null; }
      }
    }

    public static Version? GetDotnetCoreVersion() {
      if (!RuntimeInformation.FrameworkDescription.StartsWith(".NET Core ")) return null;
      var parts = RuntimeInformation.FrameworkDescription.Substring(10).Split('.');
      if (parts.Length == 2) parts = new string[] { parts[0], parts[1], "0" };
      if (parts.Length != 3) return null;
      Func<string, int> Parse = s => Int32.TryParse(s, out var i) ? i : -1;
      try { return new Version(Parse(parts[0]), Parse(parts[1]), Parse(parts[2])); } catch { return null; }
    }
  }
}

(code is C#8)