The JSON value could not be converted - ObservableCollection<T>

[Symbai]

I cannot deserialize the following JSON to an ObservableCollection (required for WPF applications) but successfully deserialize it to a List. In such a case deserializing to an ObservableCollection should be possible as well?!

Exception:

{"The JSON value could not be converted to System.Collections.Generic.ICollection`1[WpfApp12.Testing+Foo]. Path: $.MyList | LineNumber: 1 | BytePositionInLine: 22."}

JSON:

{
	"MyList": [
		{
			"Name": "Paul"
		},
		{
			"Name": "Mike"
		}
	]
}

Fails:

public class Foo
{
    public ObservableCollection<FooMember> MyList { get; set; }
}
public class FooMember
{
    public string Name { get; set; }
}

Succeeds:

public class Foo
{
    public List<FooMember> MyList { get; set; }
}
public class FooMember
{
    public string Name { get; set; }
}

[layomia]

cc @maryamariyan on bot labeling.

[layomia]

Support for ObservableCollection<T> was added for master/5.0 in dotnet/corefx#40654 and 3.1 in dotnet/corefx#41523. Can you please try one of these releases?

• https://github.com/dotnet/core-sdk#installers-and-binaries
• https://github.com/dotnet/core/blob/master/release-notes/3.1/preview/3.1.0-preview3.md

[Symbai]

@layomia Thanks for answering. I can confirm it is fixed in 5.0 alpha