如何在接口中声明事件属性？

Question

In C# 7.0, is it possible to declare an event property in an in a interface , something like:

delegate void Del();
interface I
{
    event Del E { add; remove; }
}

Similar to properties?

Answer 1

Yes, it is possible, but you either need to remove { add; remove; } { add; remove; } { add; remove; } :

interface I
{
    event Del E;
}

Or expose the delegate as a property :

interface I
{
     Del E { get; set; }
}