Exception catching from base of the class

Question

I have a base class, and I would like to catch all exceptions of the derived class within the base class, is this possible?

You won't know what the methods are from the derived class.

Answer 1

You need to provide more details about your specific scenario. However if for example you have a base abstract class that provides a contract and you want to catch all possible exceptions thrown by derived classes when calling the base class contract you can do something like this:

public abstract class Base
{
    protected abstract void InternalFoo();
    protected abstract void InternalBar();

    public void Foo()
    {
        try { this.InternalFoo(); }
        catch { /* ... */ }
    }

    public void Bar()
    {
        try { this.InternalBar(); }
        catch { /* ... */ }
    }
}

Answer 2

By calling class you mean a derived class, or a non-related class calling methods from a class derived from your base?

I guess you can do that turning your base into a proxy class. See a dynamic proxy example.