Is there some way to work with git using .NET application? [closed]

How can I pull (maybe push too) some folder from GitHub?

I mean I need API for .NET to access within C#, not GUI for git.

What I have done is however to write a simple class libray to call git commands by running child process.

First, create a ProcessStartInfo for some configuration.

ProcessStartInfo gitInfo = new ProcessStartInfo();
gitInfo.CreateNoWindow = true;
gitInfo.RedirectStandardError = true;
gitInfo.RedirectStandardOutput = true;
gitInfo.FileName = YOUR_GIT_INSTALLED_DIRECTORY + @"\bin\git.exe";

Then create a Process to actually run the command.

Process gitProcess = new Process();
gitInfo.Arguments = YOUR_GIT_COMMAND; // such as "fetch orign"
gitInfo.WorkingDirectory = YOUR_GIT_REPOSITORY_PATH;

gitProcess.StartInfo = gitInfo;
gitProcess.Start();

string stderr_str = gitProcess.StandardError.ReadToEnd();  // pick up STDERR
string stdout_str = gitProcess.StandardOutput.ReadToEnd(); // pick up STDOUT

gitProcess.WaitForExit();
gitProcess.Close();

It is then up to you to call whatever command now.

As James Manning mentioned in a comment in the currently accepted answer, the library libgit2sharp is an actively supported project providing a .NET API for Git.