VSCodeIntro

C# Starter using VSCode

• following this video "Intro to VSCode for C# Developers"
  • https://www.youtube.com/watch?v=r5dtl9Uq9V0

Setup

• install .NET Core 3.1 SDK (v3.1.201) for Mac
  • https://dotnet.microsoft.com/download
  • check dotnet --version to see 3.1.201
• install VSCode extension
  • ms-dotnettools.csharp
  • ms-mssql.mssql
  • jmrog.vscode-nuget-package-manager
  • eamodio.gitlens (optional)
  • vscode-icons-team.vscode-icons (optional)

Create App

• create solution and projects from the video

cd VSCodeIntro/
# create solution
dotnet new sln -n "VSCodeIntroSln"
# create project
dotnet new console -n "IntroUI"
# create library
dotnet new classlib -n "IntroLibrary"
# add project and library to solution
dotnet sln VSCodeIntroSln.sln add **/*.csproj
# create reference to library
dotnet add IntroUI/IntroUI.csproj reference IntroLibrary/IntroLibrary.csproj
# open each directories and answer Yes when asked required assets missing
code IntroUI/
code .
# check launch.json have program IntroUI.dll

NuGet

# NuGet from CLI
cd IntroLibrary/
dotnet add package Dapper
# add Dapper to IntroLibrary.csproj copy <ItemGroup>...</ItemGroup>
# paste to IntroUI.csproj and click Restore as suggested

# NuGet from View > Command Palette
# NuGet Package Manager: Add Package > SeriLog
# select the latest version then click Restore

• In case VSCode didn't suggest to restore, run manually

cd VSCodeIntro/
dotnet restore

Editing Shortcuts

• cw: System.Console.WriteLine();
• prop: class property

Database Connection

• install from NuGet Package Manager
  • Dapper
  • Microsoft.Data.SqlClient
  • System.Configuration.ConfigurationManager
• follow the Getting Started at https://dapper-tutorial.net/

Run

• VSCode menu Run > Run Without Debugging
• You should see the query result

Reference

• Official Setup Guide and Quick Tutorials
  • Using .NET Core in Visual Studio Code
    • https://code.visualstudio.com/docs/languages/dotnet
  • Working with C#
    • https://code.visualstudio.com/docs/languages/csharp
  • Hello World in 10 minutes
    • https://dotnet.microsoft.com/learn/dotnet/hello-world-tutorial/intro
• JAVAを数年触ったエンジニアがC#を学んで感じたこと
  • https://qiita.com/yShig/items/068090e8c55b1f5278b9