C# Reflection- Find if a class has defined destructor

Question

I am trying to find if a class has destructors using reflection. I do see methods to get constructors in System.Reflection. Is there a way to find if a class has defined custom destructors in C#?

Answer 1

The destructor method seems to be called Finalize(). All objects have this, so you want to check if it's explicitly defined on that object by trying to get it with the DeclaredOnly binding flag. It's also private and non-static so you need the other two flags as well.

myObj.GetMethod("Finalize",
                BindingFlags.NonPublic |
                BindingFlags.Instance |
                BindingFlags.DeclaredOnly)

This will return null if the object doesn't have a defined destructor.

Answer 2

Check reflection for the existence of Finalize defined on the instance in question.

The ~ClassName syntax is translated to a Finalize() method on the object.

All .NET objects have a Finalize method defined at the System.Object level.