Hotchocolate: SchemaException: Unable to create instance of type ``

[sfmskywalker]

Describe the bug
Types containing methods with a generic type argument yield the following exception:

HotChocolate.SchemaException: Multiple schema errors occured:
Unable to create instance of type ``.
Unable to create instance of type ``.
Unable to create instance of type ``.
Unable to create instance of type ``.
Unable to create instance of type ``.
Unable to create instance of type ``.
Unable to create instance of type ``.
Unable to create instance of type ``.
Unable to create instance of type ``.
Unable to create instance of type ``.

// ...(goes on for a total of 999 errors)

To Reproduce
Steps to reproduce the behavior:

1. Create a new C# class containing one property and one method that has a generic type. For example:

public class Foo
{
   public string Bar { get; set; }
   public string FooBar<T>() => Bar;
}

1. Create a class called FooType : ObjectType<Foo>.
2. Register the FooType with the schemabuilder and notice the exception I mentioned will occur.

Removing the <T> generic type argument works around the issue.
Admittedly, the example here doesn't make much sense, but I have a type in my application that uses the generic type to cast an object to T.

Expected behavior
No error should occur.

Desktop (please complete the following information):

• OS: Windows
• Version 10

Additional context

[michaelstaib]

Hi,

we will remove generic methods from the auto-detection since they do not make sense.

We will integrate the fix in version 10.4.0

[sfmskywalker]

Makes sense. Thanks!

[michaelstaib]

After some testing also Methods returning Task without any value seem to cause issues in some scenarios.