I must have done something wrong. I have a C# project in Visual Studio 2008. All of a sudden I see a lock on my classes and when I hover the class names on the top tab I see the class name as : C:\Myprojects\Oder.cs[Read Only] !
Has something weird like that happened to you before?
Open Visual Studio. On the start window, select Clone a repository. In the Browse a repository section, select Azure DevOps. Follow the prompts to clone an Azure DevOps repo that includes the files you're looking for, and then open your project.
In Visual Studio, you can access project settings by right-clciking the projects node in Solution Explorer, and choosing "Properties" from the context menu (not to be confused with the "Properties" folder that is in some Elements projects).
Visual Studio 17.2 Preview 3 introduces a brand-new All-In-One search experience that merges the existing VS Search (Ctrl + Q) and Go To (Ctrl + T) to allow you to search both your code and Visual Studio features quicker and easier than ever, all in the same place.
In my case it was a ReSharper 9.0/9.1 related issue. After clearing the ReSharper cache, I was able to edit files in my solution again.
Clearing the ReSharper cache can be done here: ReSharper -> Options -> Environment -> General
and click: Clear Caches and restart your visual studio.
(The image is contained within the first of the linked JetBrains articles).
JetBrains instructions:
Ultimate Guide to Speeding Up ReSharper (and Visual Studio) - Performance degradation after ReSharper upgrade
ReSharper Online Documentation
A couple of possibilities spring to mind:
Have you added the project to source control?
Have you marked the project folder (and all it's sub folders) as read only?
Of course, someone else may have done either of these things if they have had access to your machine.
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