Question

I have the following classes:

public class BagA : Dictionary<string, BagB>
{}
public class BagB : Dictionary<string, object>
{}

Now, through reflection I’m creating an object of type BagB which I’m
trying to add to an object I created of type BagA:

object MyBagA // Created through reflection
object MyBagB // Created through reflection

((Dictionary<string,object>)MyBagA).Add("123",MyBagB);  //This doesnt work

Gives me the following error: Unable to cast object of type ‘BagA’ to type ‘System.Collections.Generic.Dictionary`2[System.String,System.Object]’.

Why can’t I cast a Dictionary<string, BagB> to Dictionary<string, object>?
Which is the best way to add my Item based on this scenario? perhaps Anonymous methods..?

Notice that I would prefer not having to modify my classes BagA and BagB…

Thanks!

Answer 1

Since you used reflection to create your objects, it’s only fair that you need to continue using it to call their methods:

var addMethod = typeof(BagA).GetMethod("Add", new[] {typeof(string), typeof(BagB)});
addMethod.Invoke(MyBagA, new object[] {"123", MyBagB});