Cannot return null from an action method with a return type of 'Microsoft.AspNetCore.Mvc.JsonResult'
Context: I created a simple app which displays card view items on view. I have added a file picker in there. Once the file picker selected an image and the save button has been clicked, my code triggered the exception
System.InvalidOperationException: Cannot return null from an action method with a return type of 'Microsoft.AspNetCore.Mvc.JsonResult'.
My Rider does not let me debug like this (as per attached screenshot) so I have no idea what caused this exception.
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Why isnt it outputting the same
im following this https://wpf.2000things.com/2014/07/01/1105-using-applications-windows-collection-to-interact-with-other-windows/
i looked up the error on ms docs and what i think im doing wrong is that im not referencing something but im not sure what to referense
error:
'OtherWindow' does not contain a definition for 'OtherWindow' and no accessible extension method 'OtherWindow' accepting a first argument of type 'OtherWindow' could be found (are you missing a using directive or an assembly reference?)...
Error acquiring .NET when offline but works when online in VS Code
I got error acquiring .NET when I am offline but it works when online without any changes to settings.json. I have attached screenshots of it when offline and online.
I have got this error few months ago then it disappeared on its own and now I am facing it again. Any clue what's going on?...
Handling Custom Assembly Attributes in Unit Tests After Migrating from .NET Framework 4.8 to .NET 8
I recently migrated my app from .NET Framework 4.8 to .NET 8 and ran into an issue with unit tests in MS Test. The problem is related to the OriginSetupPackage custom attribute applied to the entry assembly.
In .NET Framework 4.8, the Product class loads this custom attribute from the entry assembly, like so:
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Package Error
I am getting this error while adding identity into the project
added class libraries and references also
using .net 8 version...
Blank screen after launching app, only when done through VS
I have a WPF project, using net 8. Whenever I run the program, either in Debug or Release, the main window appears, with its content visible. But, after like half a second, the window becomes blank.
However, if I run the release build's .exe, outside of VS, I don't get the issue.
The content of the window seems to still be there, as I can click on the exit button (where it should be)....
[C# console app .net4.7.2] Seemingly can't instantiate an object
Okay So I'm working on a text based adventure app for an entry level college class. I have an "Alien" base class which is inherited by a "CrabAlien" class, I'm trying to instantiate a crab alien in my "GameWorld" class but it's telling me that none of it exists in the current context and I'm not sure why. I'm sure it's something stupid I'm missing like some sort of permission level thing, but I just can't figure it out
