Set up the environment

Download SDK

Download dotnet SDK here. %[https://dotnet.microsoft.com/]

You can check your SDK info on PowerShell by below command.

dotnet --info

Command output

$ dotnet --info
.NET SDK:
 Version:   7.0.300-preview.23122.5
 Commit:    cc3d10e792

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.25357
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\7.0.300-preview.23122.5\

Host:
  Version:      7.0.3
  Architecture: x64
  Commit:       0a2bda10e8

.NET SDKs installed:
  6.0.202 [C:\Program Files\dotnet\sdk]
  6.0.203 [C:\Program Files\dotnet\sdk]
  6.0.301 [C:\Program Files\dotnet\sdk]
  6.0.404 [C:\Program Files\dotnet\sdk]
  7.0.100 [C:\Program Files\dotnet\sdk]
  7.0.300-preview.23122.5 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.14 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 6.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.14 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 6.0.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.12 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.14 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
  x86   [C:\Program Files (x86)\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

Creating sample console app

$ dotnet new console -o HelloWorld -f net7.0
The template "Console App" was created successfully.

Processing post-creation actions...
Restoring C:\Users\archdsp\Projects\HelloWorld\HelloWorld.csproj:
  Determining projects to restore...
  Restored C:\Users\archdsp\Projects\HelloWorld\HelloWorld.csproj (in 97 ms).
Restore succeeded.

Project directory

Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
d-----         5/17/2023   1:46 PM                obj
-a----         5/17/2023   1:46 PM            249 HelloWorld.csproj
-a----         5/17/2023   1:46 PM            105 Program.cs

Compile, Build, Executing

with Roslyn compiler

Find compiler and add the path as Environment Variable

dir -Path C:\ -Filter csc.exe -Recurse -ErrorAction SilentlyContinuecsc

Compile

You can compile Program.cs with Roslyn compiler with command.

csc.exe Program.cs

This will generate Program.exe under project directory

Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
d-----         5/17/2023   1:54 PM                obj
-a----         5/17/2023   1:46 PM            249 HelloWorld.csproj
-a----         5/17/2023   1:54 PM            122 Program.cs
-a----         5/17/2023   1:55 PM           4096 Program.exe

More option can be found with

csc.exe /help

With dotnet build

dotnet build .\HelloWorld.csproj

This will generate output under bin\ directory.

    Directory: C:\Users\archdsp\Projects\HelloWorld\bin\Debug\net7.0


Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----         5/17/2023   2:04 PM            422 HelloWorld.deps.json
-a----         5/17/2023   2:03 PM           5120 HelloWorld.dll
-a----         5/17/2023   2:03 PM         154112 HelloWorld.exe
-a----         5/17/2023   2:03 PM          10516 HelloWorld.pdb
-a----         5/17/2023   2:04 PM            147 HelloWorld.runtimeconfig.json

Difference

Executing

dotnet run .\Program.cs
dotnet run .\Program.exe
dotnet run .\HelloWorld.csproj
dotnet .\bin\Debug\net7.0\HelloWorld.dll