如何在程序启动时加载 NetCore 使用的所有 DLL

Question

I am developing wpf at dotnet5.

DevExpress components have been added for development.

In the process of development, When you call a subwindow containing a DevExpress control It takes about 2 seconds to load the required DLL.

After loading is complete, if you close the window again and call again, it will be called immediately.

It is thought of as the time it takes to load the DLLs related to the DevExpress control.

I installed DevExpress related packages through Nuget. Is there a way to preload all required package-related DLLs when the program is run?

Answer 1

You could start running the static initialisers for types in specific assemblies. Though you probably want to start that in a background thread.

foreach (var a in
    AppDomain.CurrentDomain.GetAssemblies()
        .Where(a => a.GetCustomAttribute<AssemblyCompanyAttribute>()?.Company == /* todo */ )
    )
{
    foreach (var t in a.GetTypes())
        RuntimeHelpers.RunClassConstructor(t.TypeHandle);
}

But there may be further lazy initialisation that would speed up these DevExpress controls.

Answer 2

Sort of. First note that assembly loading and JIT are happening on first call and so loading the assemblies is only part of the work.

You can build a single file app https://docs.microsoft.com/en-us/dotnet/core/deploying/single-file and optionally use Ahead-of-time compilation https://docs.microsoft.com/en-us/dotnet/core/deploying/ready-to-run