Intro

The .NET command-line interface (CLI) is a cross-platform toolchain for developing, building, running, and publishing .NET applications

Documentation

.NET CLI overview

dotnet Cheat Sheet

Command	Description

Command	Description
dotnet --info	Info about SDKs and runtimes installed
dotnet new sln	Creates a new solution.
dotnet new classlib	Creates a new class library project.
dotnet new nunit	Creates a new NUnit project.
dotnet sln add	Adds a project to a solution.
dotnet add reference	Adds a reference to a project.

dotnet restore	Restore’s a project’s external dependencies by downloading them via NuGet.

dotnet test	Execute unit tests

Find Out .NET Core Version Installed

Let’s check out the version of dotnet installed.

 dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   2.1.402
 Commit:    3599f217f4

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.19041
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\2.1.402\

Host (useful for support):
  Version: 2.1.24
  Commit:  1de04a1a63

.NET Core SDKs installed:
  1.0.4 [C:\Program Files\dotnet\sdk]
  2.1.202 [C:\Program Files\dotnet\sdk]
  2.1.402 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.24 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.24 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 1.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 1.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.24 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

Create A New Solution

Switch to the directory where you want a new solution to be created. The directory name will be used as the solution name.

Create the new solution with: dotnet new sln

PS C:\Users\Roger\source\repos\LearningDotNet> cd .\NUnit\
PS C:\Users\Roger\source\repos\LearningDotNet\NUnit> dotnet new sln
The template "Solution File" was created successfully.
PS C:\Users\Roger\source\repos\LearningDotNet\NUnit> dir

    Directory: C:\Users\Roger\source\repos\LearningDotNet\NUnit

Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----         1/16/2021  11:47 PM            540 NUnit.sln

Create New Class Library

Make a new directory under your solution where a new class library will be created with: dotnet new classlib

PS C:\Users\Roger\source\repos\LearningDotNet\NUnit> mkdir PrimeService

    Directory: C:\Users\Roger\source\repos\LearningDotNet\NUnit

Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
d-----         1/17/2021  12:05 AM                PrimeService

PS C:\Users\Roger\source\repos\LearningDotNet\NUnit> cd .\PrimeService\
PS C:\Users\Roger\source\repos\LearningDotNet\NUnit\PrimeService> dotnet new classlib
The template "Class library" was created successfully.

Processing post-creation actions...
Running 'dotnet restore' on C:\Users\Roger\source\repos\LearningDotNet\NUnit\PrimeService\PrimeService.csproj...
  Restoring packages for C:\Users\Roger\source\repos\LearningDotNet\NUnit\PrimeService\PrimeService.csproj...
  Generating MSBuild file C:\Users\Roger\source\repos\LearningDotNet\NUnit\PrimeService\obj\PrimeService.csproj.nuget.g.props.
  Generating MSBuild file C:\Users\Roger\source\repos\LearningDotNet\NUnit\PrimeService\obj\PrimeService.csproj.nuget.g.targets.
  Restore completed in 217.63 ms for C:\Users\Roger\source\repos\LearningDotNet\NUnit\PrimeService\PrimeService.csproj.

Restore succeeded.

PS C:\Users\Roger\source\repos\LearningDotNet\NUnit\PrimeService> dir

    Directory: C:\Users\Roger\source\repos\LearningDotNet\NUnit\PrimeService

Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
d-----         1/17/2021  12:05 AM                obj
-a----         1/17/2021  12:05 AM             89 Class1.cs
-a----         1/17/2021  12:05 AM            145 PrimeService.csproj

Add A Project To The Solution

Rename Class1.cs to PrimeService.cs and add this code to the file:

Add the class created above to the solution: dotnet sln add