Drag and Drop on Designer gives error

[dcastenholz]

Dragging a simple file from Explorer to designer surface throws error.

File contents:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
	public class Example
	{
		public int Bar { get; set; }
	}
}

Error:
Method not found: 'Microsoft.CodeAnalysis.SyntaxTree...
See attached .jpg.

[msawczyn]

Fix available for review in v1.3.0.8-pre

[dcastenholz]

No joy. Verified 1.3.0.8 installed. Same error dropping it on an empty designer.

[msawczyn]

Oh, this is most odd. I'll take another look. There's a dependency you don't have.

[dcastenholz]

thx

[msawczyn]

Is it possible that you don't have Roslyn in your Visual Studio installation? What version (number) of Visual Studio are you're using?

[msawczyn]

Interesting stuff. The Nuget packages that the project use have deviated enough from what Visual Studio uses that they've become an issue. Couple that with the fact that the new "package reference" format (as opposed to using a packages.config) doesn't necessarily copy the files into the VSIX. Luckily there's a way to work around this, and I've given it a shot with 1.3.0.8-pre3.

If you can take a look to see if it resolves this problem, I'd be in your debt.

[dcastenholz]

Sorry for the slow response. VS 2017 (15.9.17). Installed 1.3.0.10 and I have a new error.

[msawczyn]

There's something odd with your environment. While the extension does have a dependency on System.Memory, it's indirect. And that particular version isn't called for anywhere -- it's too low. Can you try uninstalling and reinstalling, rather than upgrading? May not do anything, but worth a shot. I have it installed in VS2017 as well -- in fact, it's compiled using VS2017 -- and haven't seen the kinds of issues you've been experiencing.

Thanks for the report. Looking forward to hearing the results.

[dcastenholz]

This behavior is exhibited on 2 different machines. I uninstalled and reinstalled on one of them. No change in behavior.

[msawczyn]

Can you tell me exactly what you were doing when the error popped up?

[dcastenholz]

Dragged the previously attached .cs file from the solution explorer onto the model surface and dropped it.