public class test
{
   public static void TestOfNullConditionalOperator()
   {
      string s = "Test";

      if (s?.Length > 0)
      {
         s = "Test";
      }
      if (System.Reflection.Assembly.GetEntryAssembly()?.GetName() != null)
      {
         s = "Test";
      }
   }
}
