finding .gitignore file for dotnet projects
When creating a new git repository for a C# dotnet project on GitHub, I can't seem to find a preset .gitignore file for dotnet projects. I scroll through the list looking for C#, CSharp or dotnet with no luck. Guess what it is called? VisualStudio 
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> Options
Here are a few versions of the VisualStudio .gitignore file for dotnet projects.
01. VisualStudio .gitignore template on GitHub
02. from dotnet new gitignore command
Starting from .NET Core 3.0 SDK, there a new parameter gitignore to add a dotnet .gitignore file to your project.
See dotnet new documentation.
03. from https://www.gitignore.io
When using https://www.gitignore.io to generate a .gitignore file for dotnet projects, you can select VisualStudio or CSharp as one of the options.
04. GitHub's gitignore repository
GitHub's own gitignore repository contains a collection of .gitignore templates for various programming languages, tools and frameworks. The VisualStudio template is the one to use for dotnet projects.
> Verdict
The .gitignore files from options listed above all contain reference to the source.
## Ignore Visual Studio temporary files, build results, and
## files generated by popular Visual Studio add-ons.
##
## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
There are slight differences between them, but one can't go wrong with any of them. I personally would go with the one from GitHub's gitignore repository as it is (possibly) the most up-to-date.