Can I define properties in partial classes, then mark them with attributes in another partial class?

Question

Is there a way I can have a generated code file like so:

public partial class A {
public string a {get; set;}
}

and then in another file:

Answer 1

Not as such; the compiler will complain that the member is defined in multiple parts. However, as the use of custom attributes is reflective in nature, you could define a "metadata" class and use it to contain decorators.

public class A
{
   public string MyString;
}

public class AMeta
{
   [TheAttribute("etc")]
   public object MyString;
}

...

var myA = new A();
var metaType = Type.GetType(myA.GetType().Name + "Meta");
var attributesOfMyString = metaType.GetMember("MyString").GetCustomAttributes();