C:\Program Files\Microsoft SQL Server\140\LocalDB\Binn>sqllocaldb info MSSQLLocalDB

 Name: MSSQLLocalDB
Version: 13.1.4202.2

 C:\Program Files\Microsoft SQL Server\140\LocalDB\Binn>sqllocaldb delete MSSQLLocalDB
LocalDB instance "MSSQLLocalDB" deleted.

 C:\Program Files\Microsoft SQL Server\140\LocalDB\Binn>sqllocaldb create MSSQLLocalDB
LocalDB instance "MSSQLLocalDB" created with version 14.0.1000.169.

 C:\Program Files\Microsoft SQL Server\140\LocalDB\Binn>sqllocaldb info MSSQLLocalDB
Name: MSSQLLocalDB
Version: 14.0.1000.169

public class Car {}
public class SportsCar : Car
{
   public string Color { get; set; }
}

public static void Run<T>(T car) where T : Car
{
   if (car is SportsCar sportsCar)
   {
   }

   switch (car)
   {
      case SportsCar sCar:
      break;
   }
}

 An expression of type "T" cannot be handled by a pattern of type "SportsCar"

public static void Run<T>(T car) where T : Car
{
   if ((object)car is SportsCar sportsCar)
   {
   }

   switch ((object)car)
   {
      case SportsCar sCar:
      break;
   }
}