I have the following partial method:

public partial class Foo
{
    public virtual partial void PartialMethodFoo();

    public virtual partial void PartialMethodFoo()
    {
        System.Console.WriteLine("Message One.");
    }
}

The above partial method can be overriden with two approaches.

Approach #1

public partial class Bar : Foo
{
    public override partial void PartialMethodFoo();

    public override partial void PartialMethodFoo()
    {
        base.PartialMethodFoo();

        System.Console.WriteLine("\nMessage Two.");
    }
}

Approach #2

public class Bar : Foo
{

    public override void PartialMethodFoo()
    {
        base.PartialMethodFoo();

        System.Console.WriteLine("\nMessage Two.");
    }
}

Both approaches result in overriding the partial method that was marked as virtual. But what is the difference between both approaches of overriding a partial method?

CodePudding user response：

There is no functional difference. All a partial method does is defines a method that can optionally be implemented somewhere else. There's no point in defining a partial method in Bar (or Foo for that matter) if you're going to implement the method somewhere else anyway.