[dnlib] Injecting class with method.

Hello guys. I have some problems with injecting new class with one method inside it. Basicly this class is placed in my project and i need to insert it in assembly using dnlib, then call the method from it from constructor.

My code sample:

AssemblyDef assembly = AssemblyDef.Load(FilePath);
ModuleDef module = assembly.Modules[0];
Importer importer = new Importer(module); // Create new importer.
IMethod meth = importer.Import(typeof(MyClass).GetMethod("Initialize")); // Trying to import initialization method and then place it into a new class.
TypeDef type = new TypeDefUser("NewClass"); // Creating new type.
type.Attributes = TypeAttributes.Class; // Setting class attribute.
type.Methods.Add(meth.ResolveMethodDef()); // Catching Null exception here.
module.Types.Add(type); // Adding new type into our module.
////////////////////////////////////
MethodDef cctor = module.GlobalType.FindOrCreateStaticConstructor(); 
cctor.Body.Instructions.Insert(0, Instruction.Create(OpCodes.Call, meth)); // Need to call that method here.

So, i also have another question opposite topic subject. How can i enumerate all assembly references with dnlib?