How to reference an event in C#
Unfortunately there isn't really a way of doing this. Events aren't first class citizens in .NET in general - although F# tries to promote them there.
Either pass in the subscribe/unsubscribe delegate or using a string indicating the name of the event. (The latter is often shorter, but obviously less safe at compile-time.)
Those are the approaches which Reactive Extensions takes - if there were a cleaner way of doing it, I'm sure they would be using that :(
You can create a custom Accessor.
public event EventHandler NewEvent
{
add { Dimension.LengthChanged += value; }
remove { Dimension.LengthChanged -= value; }
}
Please See https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/events/how-to-implement-custom-event-accessors
Event is not supposed to be passed into another method. However, you can pass delegate into another method. Perhaps, what you are looking for are just a simple public delegate instead of event.
If you change your event to this
public System.EventHandler LengthChanged;
You can simply pass the LengthChanged to Observer like this
Foo foo = ...;
Dimension dim = ...;
foo.Observer (dim.LengthChanged);