.Net6 new version of AssemblyLoadContext loads and unloads assemblies

Prepare two projects

The first is the console

The second project is the class library

There is only one example class in the class library project

Generate the code of the class library into a dll

 And set the property to copy to the output directory

using System.Runtime.Loader;


var domain = new AssemblyLoadContext("DomainServer", true);


var assembly = domain.LoadFromAssemblyPath(Path.Combine(AppContext.BaseDirectory, "DomainServer.dll"));


foreach (var context in AssemblyLoadContext.All)
{
    Console.WriteLine("当前存在的程序集："+context.Name);
}


Console.WriteLine("-------------------------");


domain.Unload();


foreach (var context in AssemblyLoadContext.All)
{
    Console.WriteLine("当前存在的程序集：" + context.Name);
}


Console.ReadKey();

Write the code into the Program class Since the project is created using .net7, it adopts top-level syntax and has no main method

Then execute the program

 We see that when loading the program, there are two assemblies in our project

When the current Unload unloads the assembly, there is only one assembly in our project

Create an AssemblyLoadContext object using new AssemblyLoadContext("DomainServer", true);

The second argument is true to enable uninstallation; otherwise, false. The default value is false because of the performance penalty of enabling offloading.

This unload will only unload all assemblies loaded in AssemblyLoadContext

We can also subscribe to the uninstall event so we know that those assemblies were successfully uninstalled

using System.Runtime.Loader;

var domain = new AssemblyLoadContext("DomainServer",true);

var assembly = domain.LoadFromAssemblyPath(Path.Combine(AppContext.BaseDirectory, "DomainServer.dll"));

foreach (var context in AssemblyLoadContext.All)
{
    Console.WriteLine("当前存在的程序集："+context.Name);
}

Console.WriteLine("-------------------------");

domain.Unloading += context =>
{
    Console.WriteLine("当前卸载的程序集："+string.Join(',', context.Assemblies.Select(x => x.FullName)));
};

domain.Unload();

foreach (var context in AssemblyLoadContext.All)
{
    Console.WriteLine("当前存在的程序集：" + context.Name);
}

Console.ReadKey();

Execution effect:

Ok, let's introduce it here! 

Methods that can be used in versions above .Net 6

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