Type not found in cache: System.Func for injecting a type as a Func using MVVMLight SimpleIoc

Question

I am registering a type in MVVMLight SimpleIoc,

SimpleIoc.Default.Register<MyInjectingClass>();

Then I do a constructor injection of this type as a Func,

public class MyConsumerClass
{
    readonly Func<MyInjectingClass> _injectingClassFactory;

    public MyConsumerClass(Func<MyInjectingClass> injectingClassFactory)
    {
        _injectingClassFactory = injectingClassFactory;
    }
}

But at runtime, I get this error,

Type not found in cache: System.Func`1[[<...>.MyInjectingClass, <...>, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].

How can I constructor inject a type as a Func?

Note:

I'm doing this stuff in a Xamarin.IOs project. The NuGet I use for MVVMLight SimpleIoc is this.

Answer 1

I figured out that, to inject a type as a Func, then you have to

• Register the type first
• Then register it as a Func (consuming the above registered type)

That is,

SimpleIoc.Default.Register<MyInjectingClass>(); // should happen first

SimpleIoc.Default.Register<Func<MyInjectingClass>>(
    () => () => SimpleIoc.Default.GetInstance<MyInjectingClass>(
        Guid.NewGuid().ToString()
    ));

The type is simply registered in a way telling it to return a Func object of the MyInjectingClass, that retrieves a new object each time.

Guid.NewGuid().ToString() makes sure a new MyInjectingClass object is returned for the SimpleIoc.Default.GetInstance<MyInjectingClass> method.