C# event handling (compared to Java)

Question

I am currently having a hardtime understanding and implementing events in C# using delagates. I am used to the Java way of doing things:

1. Define an interface f

Answer 1

You'll have to define a single delegate for that

public delegate void ComputerEvent(object sender, ComputerEventArgs e);

ComputerEventArgs would be defined like this:

public class ComputerEventArgs : EventArgs
{
    // TODO wrap in properties
    public Computer computer;
    public Exception error;

    public ComputerEventArgs(Computer aComputer, Exception anError)
    {
        computer = aComputer;
        error = anError;
    }

    public ComputerEventArgs(Computer aComputer) : this(aComputer, null)
    {
    }
}

The class that fires the events would have these:

public YourClass
{
    ...
    public event ComputerEvent ComputerStarted;
    public event ComputerEvent ComputerStopped;
    public event ComputerEvent ComputerReset;
    public event ComputerEvent ComputerError;
    ...
}

This is how you assign handlers to the events:

YourClass obj = new YourClass();
obj.ComputerStarted += new ComputerEvent(your_computer_started_handler);

Your handler is:

private void ComputerStartedEventHandler(object sender, ComputerEventArgs e)
{
   // do your thing.
}