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2.1.104 |
You can get more information about your platform with the --info flag: |
dotnet --info |
.NET Command Line Tools (2.1.104) |
Product Information: |
Version: 2.1.104 |
Commit SHA-1 hash: 48ec687460 |
Runtime Environment: |
OS Name: Mac OS X |
OS Version: 10.13 |
(more details...) |
If you see output like the above, you're ready to go! |
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Hello World in C# |
Hello World in C# |
Before you dive into ASP.NET Core, try creating and running a simple C# |
application. |
You can do this all from the command line. First, open up the Terminal |
(or PowerShell on Windows). Navigate to the location you want to store |
your projects, such as your Documents directory: |
cd Documents |
Use the dotnet command to create a new project: |
dotnet new console -o CsharpHelloWorld |
The dotnet new command creates a new .NET project in C# by default. |
The console parameter selects a template for a console application (a |
program that outputs text to the screen). The -o CsharpHelloWorld |
parameter tells dotnet new to create a new directory called |
CsharpHelloWorld for all the project files. Move into this new directory: |
cd CsharpHelloWorld |
dotnet new console creates a basic C# program that writes the text |
Hello World! to the screen. The program is comprised of two files: a |
project file (with a .csproj extension) and a C# code file (with a .cs |
extension). If you open the former in a text or code editor, you'll see this: |
CsharpHelloWorld.csproj |
<Project Sdk="Microsoft.NET.Sdk"> |
12 |
Hello World in C# |
<PropertyGroup> |
<OutputType>Exe</OutputType> |
<TargetFramework>netcoreapp2.0</TargetFramework> |
</PropertyGroup> |
</Project> |
The project file is XML-based and defines some metadata about the |
project. Later, when you reference other packages, those will be listed |
here (similar to a package.json file for npm). You won't have to edit this |
file by hand very often. |
Program.cs |
using System; |
namespace CsharpHelloWorld |
{ |