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mcs -out:HelloWorld.exe HelloWorld.cs

The resulting HelloWorld.exe can then be executed with:

mono HelloWorld.exe

which will produce the output:

Hello, world!
Press any key to exit..

Creating a new program using .NET Core

First install the .NET Core SDK by going through the installation instructions for the platform of
your choice:

• Windows
• OSX
• Linux
• Docker

After the installation has completed, open a command prompt, or terminal window.

1. Create a new directory with mkdir hello_world and change into the newly created directory
with cd hello_world.

2. Create a new console application with dotnet new console.
This will produce two files:

• hello_world.csproj

<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp1.1</TargetFramework>
</PropertyGroup>

</Project>

• Program.cs

using System;

namespace hello_world
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");

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