Xamarin - Error IDE1100 Error reading content of source file

Question

I've made a new content page, but forgot to type the name.. So I deleted it an made it again with proper name..

I have done it like this multiple times already, but this time something went wrong and I cannot compile. I have this error message:

Severity    Code    Description Project File    Line    Suppression State
Error   IDE1100 Error reading content of source file 
'C:\Users\shark\source\repos\GalShare\GalShare\GalShare\Views\Page1.xaml' -- 'Could not find file 
'C:\Users\shark\source\repos\GalShare\GalShare\GalShare\Views\Page1.xaml'.'.    GalShare-XamlProject     
C:\Users\shark\source\repos\GalShare\GalShare\GalShare\Views\Page1.xaml 1   Active

I have done nothing except the steps above.. What is the cause of this error and how can I fix it?

Answer 1

In addition to the answers of E.Zhao and messyprogrames, here a step-by-step walkthrough.

Clean Solution:
Navigation Bar > "Build" > "Clean Solution"

Unload project:
Choose your "problem project" on the right side within the solution explorer. Right mouse click > "Unload Project"

Reload project:
Choose your unloaded "problem project" again. Right mouse click > "Reload Project".

Answer 2

Cleaning the project did not solve, but closing and reopening solved my problem.