public void ReadAssembly(string path, out WeakReference alcWeakRef)
{
// Create the unloadable DigitalAssemblyLoadContext
var alc = new DigitalAssemblyLoadContext(path);
// Load System.ComponentModel.TypeDescriptor to the ALC beforehand,
// as otherwise the internal caches in it will block unloading the ALC: https://github.com/dotnet/coreclr/issues/26271
// The netstandard assembly shim also needs to be loaded explicitly for the TypeDescriptor to be loaded.
var typeDescriptorAssemblyPath = typeof(TypeDescriptor).Assembly.Location;
alc.LoadFromAssemblyPath(typeDescriptorAssemblyPath);
var netstandardShimAssemblyPath = Path.Combine(Path.GetDirectoryName(typeDescriptorAssemblyPath), "netstandard.dll");
alc.LoadFromAssemblyPath(netstandardShimAssemblyPath);
// Create a weak reference to the AssemblyLoadContext that will allow us to detect
// when the unload completes.
alcWeakRef = new WeakReference(alc, trackResurrection: true);
// Load the plugin assembly into the HostAssemblyLoadContext.
// NOTE: the assemblyPath must be an absolute path.
Assembly assembly = alc.LoadFromAssemblyPath(path);
// Get a class and its method via reflection.
Type classType = assembly.GetType("DynamicLibrary.ServiceClient");
MethodInfo method = classType.GetMethod("Connect");
var classObj = Activator.CreateInstance(classType);
var result = method.Invoke(classObj, new object[] { 100 });
Console.WriteLine("Value of the row count is: " + result);
alc.Unload();
}
private Assembly GetAssemblyFromStream(DigitalAssemblyLoadContext alc, string path)
{
Assembly assembly = null;
using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read))
{
assembly = alc.LoadFromStream(fs);
}
return(assembly);
}
