System.IO.FileNotFoundException: 'Could not load file or assembly 'System.Memory, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'

[TonyHenrique]

I used the code from on my UWP Application

But when I run it,

On the SignalRService class, method Init()
on this line
new HubConnectionBuilder().WithUrl(info.Endpoint, (options) => options.AccessTokenProvider = () => Task.FromResult<string>(info.AccessKey))

throws

System.IO.FileNotFoundException: 'Could not load file or assembly 'System.Memory, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. O sistema não pode encontrar o arquivo especificado.'

I did not find a NuGet that matches this version 4.0.1.0

My UWP Project is
Target version:
Windows 10, version 1803 (10.0; Build 17134)

Min version:
Windows 10, version 1803 (10.0; Build 17134)

[TonyHenrique]

Someone else is also having this issue with the Microsoft.AspNetCore.SignalR.Client
aspnet/SignalR#1294 (comment)

[TonyHenrique]

Is this System.Memory issue related to this? SixLabors/ImageSharp#459 (comment)

[TonyHenrique]

If I set
Target version:
Windows 10, version 1803 (10.0; Build 17134)

Min version:
Windows 10 Fall Creators Update (10.0; Build 16299)

Then it works.

[GrillPhil]

So this is what I recommended in the first place ;-) seems to be an issue within UWP 1803 so I will close this for now.