Question

I have a project named “Test.LiveModel” (Test.LiveModel.dll) and its version is 8.0.7.0 in my solution which contains 25 projects. I can see the information of Test.LiveModel in AssemblyInfo.cs. I have two category of objects named ‘base class category’ and ‘user-defined class category’ which are displaying in my application UI. I am displaying this through a property which is of class Type

Now I am considering one base class category object named “Server” and one user-defined class category object RoundedTree. When I set value as “Server” in Property in Grid after saving it when I restart my application I can see the saved value, but for “RoundedTree” which is not happening due to type becomes null. So I did a thorough analysis and came to know that issue is in ToType() method shown below
This is ToType() metho

For base class Server xmlSerializableType.Name, I am getting as Test.LiveModel.Server and AssemblyName I am getting as Test.LiveModel, Version=8.0.7.0, Culture=neutral, PublicKeyToken=23bd062a94e26d58 and type I am getting by using Type.GetType as type = {Name = "Server" FullName = "Test.LiveModel.Server"}

But for user defined class xmlSerializableType.Name I am getting as _Rounded_Tree. ‘type’ I am getting as null by using Type.GetType. AssemblyName I am getting as _Rounded_TreeTest-Machine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null, but even assembly.GetType I am getting as null. What is the reason behind it? Why am I getting assembly version 0.0.0.0? I mean full assembly _Rounded_TreeTest-Machine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null.

This is the method CreateType() which will create assembly and type as myTypeBuilder for userdefined class:

 public Type CreateType()
  {

     // Create the assembly name by appending the machine name to the typename.
     myAsmName.Name = this.TypeName + Environment.MachineName;
     // Define assembly that can be executed but not saved
     this.UserClassAssemblyBuilder = myDomain.DefineDynamicAssembly(myAsmName, AssemblyBuilderAccess.Run);
     // Create dynamic module with symbol information
     this.UserClassModuleBuilder = this.UserClassAssemblyBuilder.DefineDynamicModule("userdefinedmodule", true);

So here is my question: if real Dll has some version number, and user defined class assembly has version 0.0.0.0, is that the reason why I am getting type as null after using Type.GetType and assembly.GetType method?

Answer 1

Here are some suggestions which may solve the problems.

Define a assembly version

new AssemblyName(this.TypeName + Environment.MachineName) 
{ 
    Version = new Version("1.0.0.0") 
};

Use full qualified names for the serialization

myObject.GetType().FullName