VB.NET到C#转换-非EventHandler事件的接口事件声明

您需要一个委托类型声明:

public delegate void SomeEventHandler(object sender, SomeType value)

public class SomeType
{
}

public interface ISomething
{
    public event SomeEventHandler SomeEvent;
}

能够 使用内置的操作类型:

public class SomeType
{
}

public interface ISomething
{
    public event Action<object, SomeType> SomeEvent;
}