Assembly loadfrom file

The beauty of this is that it does not load same assembly again from any other path if it has been loaded by this method before. For example, let's say I have MyAssembly. When the application will run, this assembly will automatically be loaded from the first path. Now if I try to load the assembly using Assembly. LoadFrom from path 1, it will not be loaded.

LoadFrom , it will not be loaded now as it has already been loaded from path 2. In short, Assembly. LoadFrom allows assembly to be loaded once from a path from which it has not been loaded yet. So, using the above two methods, you can load an assembly at least two times even if everything in those assemblies is the same. This is the most lazy method you can say. It tries to minimise its work and does not look for anything. If you call this method, it will load the assembly every time in the AppDomain.

No no, don't think it is that lazy if you give this method same location again it will not load the assembly again from same path but it will do if path is different. So to get an assembly loaded 10 times, you need to have 10 different locations where the same assembly is present.

As a thumb rule, you should always rely on Assembly. Load in case you know the path of assembly is not in. NET search path use Assembly. LoadFrom but even in that case, check using AppDomain. GetAssemblies method if the assembly is already loaded before into the AppDomain. For a long time, I was confused as to why. NET is providing a silly method like Assembly. LoadFile but later I came to know that there may be a scenario in which the architecture of product may be such that it is loading assembly dynamically from the various locations based on the requirement but the versions are same in all folders.

For example, let's say that I am making an international product which has resources in an assembly which is present in the folder named after the country. For simplicity purposes, I want to keep the version and assembly name the same for all these assemblies. Now the server is present in one country and the requests are coming from all over the world. The server part needs to load all the assemblies with the same version and name based on from which country the request is coming.

Application is retrieving resource text using reflection by loading the assembly. Now to achieve this, we have to use Assembly. LoadFile so that we can load all the assemblies in spite of the fact that their version and name is same. Now I hope you must have got the answers of all the questions I asked at the start of this topic. Still something I want to tell you may be left Let's see. Answer 1. This is obviously yes, any of the above methods will do that.

NET Framework. Please use an overload of LoadFile which does not take an Evidence parameter. By default, legacy CAS policy is not enabled in the. NET Framework 4; when it is not enabled, securityEvidence must be null. LoadFile does not load files into the LoadFrom context, and does not resolve dependencies using the load path, as the LoadFrom method does.

Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Load File Method Reference Is this page helpful? Please rate your experience Yes No. Any additional feedback? Hope this helps. Hardik Hardik 5 5 silver badges 9 9 bronze badges. You can't pass an byte array to Assembly.

I edited your post, but somebody changed it back. I load dlls as plugins dynamically and then when its the moment of uninstall them I should erase the file. The Hardik method works perfectly, no AppDomain hassles or something.

Load and not Assembly. LoadFrom anymore. Hardik is correct: The Assembly Load method holds a reference to the file loaded, preventing that file from being overwritten or deleted by another process. So it's a clever workaround to use the File object's ReadAllBytes method, which does not hold a reference. Once those bytes are read and the file is closed, the result is passed to the Assembly Load method. Quite clever! This is now the best solution although it currently has less than half of the points the leading answer.

Show 3 more comments. See reference To call the garbage collector, you can use GC. Collect ; GC calls the finalizers in a background thread, that's why you have to wait and call Collect again to make sure you deleted everything.

I'm loading and potentially unloading dozens of dlls. What are the performance implications and other relevant implications of creating, say, 70 AppDomains? Should I avoid doing that if possible? I suppose if it's just for this operation that would work, but in a situation where I actually want my application to instantiate some objects from the assembly, use them, destroy them and unload the assembly, wouldn't loading it in a separate AppDomain cause some accessibility headache? Yuriy Rozhovetskiy Yuriy Rozhovetskiy CreateDomain nameof Loader , AppDomain.

GetDirectoryName typeof Loader. CreateInstanceAndUnwrap typeof Loader. FullName, typeof Loader. FullName ; loader. Edward Brey Edward Brey TarmoPikaro TarmoPikaro 4, 1 1 gold badge 34 34 silver badges 48 48 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.