Cannot create an instance of UserControl in design view, works in Release mode and at runtime-CodePudding

The

And if I look at the detail of why, it says Cannot locate resource 'images/loading_spinner.gif':

If I look at LoadingIndicatorControl in design view it does in fact locate the loading_spinner.gif resource and gives no errors.

What I have tried:

Clean and rebuild numerous times

Close VS2019 and reopen

Clean, close VS, reopen and rebuild

Set Loading_Spinner.gif Build Action to Embedded Resource (was Resource which also works at runtime)

Tried platform targets Any CPU, x64, x86

Interestingly, setting to build configuration to Release does prevent the error from appearing! It only appears when Debug is used.

I'm using Visual Studio Professional v16.11.16.

Any ideas how I can fix this?

CodePudding user response：

I appear to have fixed it by removing the constructor:

public LoadingIndicatorControl() { InitializeComponent(); }

I don't understand why. There's nothing special or unusual in there, but I've verified; adding it back causes the error to appear, and removing it removes the error and allows the user control to render in the design view.