C WPF normal project suddenly prompts that the name "initializecomponent" does not exist in the current context

Problem description

An existing C# project , It's good to open it before , Never changed , The following error will be prompted when you reopen it recently , Lead to wpf The control of failed to initialize , Some control prompts cannot be found .
Although there are red lines indicating errors , But the project can still run .

 The name... Does not exist in the current context “InitializeComponent”

resolvent

There are many solutions to this problem on the Internet , Mostly for sure namespace And so on , Those solutions are mainly for errors caused by copying code .
The effective solution to my situation is

1、 Open and prompt the wrong file （xaml.cs） Corresponding to xaml file 
2、 Make any changes , For example, add a space or something 
3、 Then save 
4、 At this time, it should be good to return to the file just prompted 
 Simply put, save it again xaml file .

Solve the issue from https://www.itranslater.com/qa/details/2110249013411841024