This is error??

[mem981]

A normal day I code, I test no problem. The next day, when I reopened it and tried to build it, I got this problem. pls help me, i love this pj so much :((

 

[boasfesta]

Try CTRL + SHIFT + B and then restart VS

If doesnt work, show us your Project Explorer at VS

[mem981]

this is my Project, Is there any reason for this error?

[boasfesta]

12 hours ago, mem981 said:

this is my Project, Is there any reason for this error?

Try to select all projects in a row just by pressing SHIFT

Right click and select "Clean", after that do "Rebuild". Lets see if it works.

[Cheshire]

If that fails, you could also try and delete the hidden .vs folder next to your project file, that sometimes caches weird issues in it when swapping between git branches.

[Habib]

I would say that probably some of your .NET Framework is not compatible with another. Have you changed your framework target whatsoever?