C＃不要覆盖重写的方法

Question

is there an attribute or pattern to tell the compiler don't allow override overridable method?

For example:

Vehicle

public class Vehicle
{
    public virtual void Start() { }
}

Car

public class Car : Vehicle
{
    // ################
    [DontAllowOverrideAgain] //I need something like this attribute
    // ################
    public override void Start()
    {
        // Todo => codes that every car must invoke before start ...
        CarStart();
        // Todo => codes that every car must invoke after start ...
    }

    public virtual void CarStart() { }
}

CoupeCar

public class CoupeCar : Car
{
    // throw and error or show a message to developer
    public override void Start() { }

    public override void CarStart() { }
}

Answer 1

Sure, just create the first override as sealed , which would lead to a compile time failure that the developer can see

public class Car : Vehicle
{
    public sealed override void Start()
    {
        // Todo => codes that every car must invoke before start ...
        CarStart();
        // Todo => codes that every car must invoke after start ...
    }

    public virtual void CarStart() { }
}

Answer 2

Here you have it, use sealed

Ref. https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/sealed

public class Car : Vehicle
{
     sealed protected override void Start()
    {
        // Todo => codes that every car must invoke before start ...
        CarStart();
        // Todo => codes that every car must invoke after start ...
    }

    public virtual void CarStart() { }
}