Question

Suppose I have three classes A,B and C generated via emit/reflection abilities of .NET framework, and emmiting object in following manner:

class A
{
   B someField1;
   C someField2;
}

I need to initialize someField1 and someField2 after creating object:

A someObject;

How to do this? The someObject type is object but I have no idea how to cast it to A type created dynamically and enter fields and initialize it. Thank’s in advance for help.

Answer 1

You cannot cast to a dynamically created type in your code, as the compiler cannot know that type.

You can do what you need in a couple of ways:

// 1 - using reflection
// these will actually be your dynamically created objects...
object a = CreateA();
object b = CreateB();
System.Reflection.FieldInfo someField1 = a.GetType().GetField(
    "someField1", 
    BindingFlags.Instance | BindingFlags.NonPublic);
someField1.SetValue(a, b);

or

// 2 - using dynamic (C# 4)
dynamic a = CreateA();
dynamic b = CreateB();
a.someField1 = b;