How to permanently saved code in VB.NET core(? ) 7

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I created a new .net framework project just to create line chart since I used .net 7 which did not include chart in it. I successfully created line chart and was able to transfer the line chart from net framework to my project(.net core) but after 1 or 2 successful run or after I made some changes, it removes all the code which only includes the line chart code that I copied.

What I have tried:

I only copied and pasted from .net framework project my notes to my .net 7 project

Posted 20-Jul-23 2:00am

Ronalyn Ablang

Updated 20-Jul-23 3:39am

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Richard MacCutchan 20-Jul-23 9:02am

You cannot expect anyone here to guess what the problem is, or even what you mean by, "after I made some changes". Please provide proper details of your problem, including any relevant code.

Ronalyn Ablang 20-Jul-23 11:46am

Sorry, it's perfectly fine now. The previous nuget package that I installed is maybe not compatible with .net core. I installed new nuget (WinForms.DataVisualization by Microsoft, Kirsan, etc) and it now shows the line chart and can be editable in my .net core project

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OriginalGriff · Answer 1 · 2023-07-20T03:39:00

The VS compiler or editor have never shown any tendency to remove code - except occasionally when you remove an Event handler from a control in the designer when it can remove the attached method as well.

I have never seen it remove a whole file or it's content, and am pretty sure that if anyone else had, even Microsoft would have fixed it pretty quickly.

Quote:
after 1 or 2 successful run or after I made some changes, it removes all the code

At a guess, the changes you made accidentally included removing all the code.

But we can't tell you what to do, or even that it is fixable: it may be that if you still have the same instance of VS open, and the file is still open you may be able to get it back by undoing changes until it reappears - but we have no idea what changes you made of what your code previously looked like.

Can I suggest that you should urgently review your backup procedures and in future ensure that before any major changes are made you ensure a copy of the working code is made, either automatically or manually?