testaRadios.cs

public static class Parse{

  public static int? ParseInt(this string num){
      int val;
      if (int.TryParse(num, out val)) {
          return val;
      }
      return null;
  }
  
}

_Igual.Tag = (Func<bool>)() => _TextValPalite.Text.Parse() == _ValSorteado.Text.Parse();
_Maior.Tag = (Func<bool>)() => _TextValPalite.Text.Parse() > _ValSorteado.Text.Parse();
_Menor.Tag = (Func<bool>)() => _TextValPalite.Text.Parse() < _ValSorteado.Text.Parse();

var radios = new[]{_Igual, _Maior, _Menor};
for(int i = 0; i < radios.Length; ++i){
	if(radios[i].Checked){
		var testa = radios[i].Tag as Func<bool>;
		if(testa()){
			_adicionar++;
			_Acerto.Text = Convert.ToString(_adicionar);
		}else{
			_retirar++;
			_Errou.Text = Convert.ToString(_retirar);
		}
		break;
	}
}