How to convert delegate to identical delegate?

Question

There are two descriptions of the delegate: first, in a third-party assembly:

public delegate void ClickMenuItem (object sender, EventArgs e)

s

Answer 1

Thomas Levesque's answer does not work well for some special cases. This is an improved version.

public static Delegate ConvertDelegate(this Delegate src, Type targetType, bool doTypeCheck)
{
    //Is it null or of the same type as the target?
    if (src == null || src.GetType() == targetType)
        return src;
    //Is it multiple cast?
    return src.GetInvocationList().Count() == 1
        ? Delegate.CreateDelegate(targetType, src.Target, src.Method, doTypeCheck)
        : src.GetInvocationList().Aggregate
            (null, (current, d) => Delegate.Combine(current, ConvertDelegate(d, targetType, doTypeCheck)));
}

The benefit of the above code is it passes the following test

EventHandler e = (o,e)=>{}
var a = e.ConvertDelegate(typeof(Action), true);
Assert.AreEqual(e, e.ConvertDelegate(typeof(EventHandler), true));

whilst

EventHandler e = (o,e)=>{}
var a = new Action(e);
Assert.AreEqual(e, new EventHandler(a));

will fail.