Is it possible to use a c# object initializer with a factory method?

Question

I have a class with a static factory method on it. I want to call the factory to retrieve an instance of the class, and then do additional initialization, preferablly via c# object initializer syntax :

MyClass instance = MyClass.FactoryCreate()
{
  someProperty = someValue;
}

vs

MyClass instance = MyClass.FactoryCreate();
instance.someProperty = someValue;

Answer 1

Yes. You can use object initializer for already created instance with the following trick. You should create a simple object wrapper:

public struct ObjectIniter<TObject>
{
    public ObjectIniter(TObject obj)
    {
        Obj = obj;
    }

    public TObject Obj { get; }
}

And now you can use it like this to initialize your objects:

new ObjectIniter<MyClass>(existingInstance)
{
    Obj =
    {
        //Object initializer of MyClass:
        Property1 = value1,
        Property2 = value2,
        //...
    }
};

P.S. Related discussion in dotnet repository: https://github.com/dotnet/csharplang/issues/803