Programmatically with C# code restore PackageReferences

Question

I'm trying programmatically with C# base code to restore packageReference for .NET framework & .NET core projects.

I thought about using dotnet.exe / msbuild.exe but I don't know how!

I want to simulate what we can do with dotnet CLI:

dotnet restore '.\myproject.csproj' --packages '.\OutputFolder'

but I want to do it programmatically.

Thanks for the answers.

Hm, if I understand it correctly you mean something like Run Command Prompt Commands? With System.Diagnostics.Process.Start("CMD.exe", "dotnet restore '.\myproject.csproj' --packages '.\OutputFolder'"); you can run your dotnet command programmatically. — Mar Tin
– Mar Tin, Commented Aug 20, 2019 at 9:15
@EliSherer It can be a solution, but when I’ll deploy it to a specific environment with windows/linux machine host it will work or not! What do you think? — Tester User
– Tester User, Commented Aug 20, 2019 at 9:23
@MarTin when I’ll deploy it to a specific environment with windows/linux machine host it will provoke risks or not! What do you think? — Tester User
– Tester User, Commented Aug 20, 2019 at 9:41
Yes it will. But you can check and handle the enviroment before the execution. Environment.OSVersion.Platform to check platform. Or var values = Environment.GetEnvironmentVariable("PATH"); to check cmd.exe. It is always a risk to execute 3rd party. It is the same for dotnet. You have to proof dotnet exist as enviroment PATH variable before. — Mar Tin
– Mar Tin, Commented Aug 20, 2019 at 10:05

Chirag · Accepted Answer · 2021-06-04 20:41:53Z

If using shell is ok, You may try following steps to restore nuget packages using c#.

Download latest version of Nuget.exe from NuGet Gallery Downloads
Add Nuget.exe to your C# project and mark as "Copy if newer" to Copy to Output Directory
Run below RestorePackages() method with solution path as parameter


        public static void RestorePackages(string solutionPath)
        {
            var dir = AppDomain.CurrentDomain.BaseDirectory;
            ProcessStartInfo objPI = new ProcessStartInfo($"{dir}\\nuget.exe", $"restore \"{solutionPath}\" -Verbosity quiet");
            objPI.RedirectStandardError = true;
            objPI.RedirectStandardOutput = true;
            objPI.UseShellExecute = false;

            Process objProcess = Process.Start(objPI);
            string error = objProcess.StandardError.ReadToEnd();
            string output = objProcess.StandardOutput.ReadToEnd();

            objProcess.WaitForExit();
        }

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