• استفاده از شبیه ساز‌ها مانند Virtual Box یا VMWare
  
• استفاده از نسخه دستکاری شده که بتوانید بر روی سیستم سخت افزاری خود نصب کنید
  

If Not a And b Then
  ...
Else
  ...
EndIf

if(!(a) && b)
{
...
}
else
{
}

public interface ICommand
{
}

public class Command1 : ICommand
{
}

public class Command2 : ICommand
{
}

ICommand command = new Command1();
if (!(command is Command2))
{

}

if (command is not Command2)
{

}

if ((command is ICommand) && !(command is Command2))
{

}

if (command is ICommand and not Command2)
{

}

if (command is Command1 or Command2)
{

}

var number = new Random().Next(1, 10);
if (number > 2 && number < 8)
{

}

if (number is > 2 and < 8)
{

}

public static bool IsLetterOrSeparator(char c) =>
   (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '.' || c == ',';

public static bool IsLetterOrSeparator(char c) =>
   c is (>= 'a' and <= 'z') or (>= 'A' and <= 'Z') or '.' or ',';

 var number = new Random().Next(1, 10);
 if (number <= 0)
 {
     Console.WriteLine("Less than or equal to 0");
 }
 else if (number > 0 && number <= 10)
 {
     Console.WriteLine("More than 0 but less than or equal to 10");
 }
 else
 {
     Console.WriteLine("More than 10");
 }

// C#9.0
 switch (number)
 {
     case <= 0:
         Console.WriteLine("Less than or equal to 0");
         break;
     case > 0 and <= 10:
         Console.WriteLine("More than 0 but less than or equal to 10");
         break;
     default:
         Console.WriteLine("More than 10");
         break;
 }

// C#7.0
 switch (number)
 {
     case int value when value <= 0:
         Console.WriteLine("Less than or equal to 0");
         break;
     case int value when value > 0 && value <= 10:
         Console.WriteLine("More than 0 but less than or equal to 10");
         break;
     default:
         Console.WriteLine("More than 10");
         break;
 }

 var message = number switch
 {
     <= 0 => "Less than or equal to 0",
     > 0 and <= 10 => "More than 0 but less than or equal to 10",
     _ => "More than 10"
 };

private static int GetDiscount(Product p) => p switch
        {
            Food => 0, // Food _ => 0 before C# 9
            Book b => 75, // Book b _ => 75 before C# 9
            _ => 25
        };

function purchaseProduct(){
  console.log("Function : purchaseProduct");
  var credits = getCredits();
  if(credits > 0){
    reserveProduct();
    return true;
  }
  return false;
}

• توابع arrow زمانیکه داخل بدنه‌ی آنها بیش از یک عبارت قرار گیرد لازم است که به طور صریح از کلید واژه return استفاده شود.
  
• برای برگشت یک شیء خالی باید از سینتکس زیر استفاده کنیم:
  

• تمامی ویژگی‌هایی را که برای پارمترها گفته شد، می‌توان برای توابع arrow بکار برد.
  

<Project>
  <ItemGroup>
    <PackageVersion Include="Microsoft.Extensions.Localization.Abstractions" Version="3.1.8" />
    <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.8" />
  </ItemGroup>
</Project>

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Localization.Abstractions" />
    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
  </ItemGroup>
</Project>

error NU1008: Projects that use central package version management should not define the version on the PackageReference items

<Project>
  <PropertyGroup>
    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
  </PropertyGroup>
  <ItemGroup>
    <PackageVersion Include="Microsoft.Extensions.Localization.Abstractions" Version="3.1.8" />
    <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.8" />
  </ItemGroup>
</Project>