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Language

Class name and function name seems to have Capitalize letter in front

Instructions

Instruction end with a ;

# can be name or name.subname.subname
# follow the directory tree
namespace name
{
}

# inside namespace
class name
{
}

interface name<out type>
{
}

Function call is the function name followed by (), parameter are comma separated in the ().

Function declaration: visibility [static] returntype Name(arg1, arg2) {}

Function declaration: visibility [static] returntype Name(arg1, arg2) => ReturnInstruction;

Constructor: function name with the same name that the class

Property declaration: visibility [readonly] variableType variableName;

public string bla { get; set; }

Visibility: public|private

[Annotation(Property = bla, ...)] just before a class

Template: VarType<SomeType>

Variables

Declaration: type name = value

Types

char with single quote: 'a'

string with double quote: "bla" # string are object, and you can use method on them

Operator

object.property
object.property?.maybenull
nullish ?? othervar

string Concatenation: a + b
string Interpolation: $"Test {variable}"

String Methods

# on an object string
string.Contains(string) : bool
string.Replace(string a, string b) : string
string.ToLower() : string
string.ToUpper() : string
string.Trim() : string
string.TrimEnd() : string
string.TrimStart() : string
string.StartsWith() : bool
string.EndsWith() : bool

# static call on string
string.IsNullOrEmpty(string a): bool

Conversion

bool true : "True"

bool false : "False"

Library

Console.WriteLine(string)
DateTime.Now: string

Hello World

In the csharp console:

Console.WriteLine("Hello World!");

CLI App

using System;

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

csc program.cs

wget https://packages.microsoft.com/config/debian/10/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb

sudo apt update
# 91.6 Mo
sudo apt install dotnet-sdk-5.0

# checking
dotnet

# create a folder "myWebApp" with a configuration in "myWebApp.csproj"
dotnet new webApp -o myWebApp --no-https

cd myWebApp
dotnet run

# open http://localhost:5000/ in a browser