Filemon meaning3/9/2023 So, what should I do if it can’t find the assembly? You can manully add folders to an AppDomain’s search path by using the “ AppendPrivatePath” method. In web applications it will also include the application’s Bin directory in the search path. If it will fail to find it in the GAC, it will start to serach in the system’s search path. If no such policy file exists, it will try to load the assembly from the GAC. If it does, it will try to load the assembly with the version specified there. If such a file exists it will look inside of it if the version of the assembly that we are trying to load matches the version/versions range written in the policy file. The loader will search for a policy file named in the format of: If it is, it will start its search in the Global Assembly Cache (a.k.a the GAC. NET assembly loader checks is whether the assembly is strongly signed. If you don’t have a full qualified name of the type, you can always use, give it the full path (or relative path) to the assembly and call assembly.GetType with the type you want to get and continue from there on. NET assembly loader logic next) and if it succeeds, it will get the Type object which will allow us to create an instance of that type. This piece of code will try to load the relevant assembly (we will talk about the. Object obj = Activator.CreateInstance(type) Type type = Type.GetType(typeFullQualifiedName) String typeFullQualifiedName = “fully qualified name of type here” If there is a program that needs to load some type and create it dynamically and the assembly of that type is strongly signed you can use the following piece of code to load and create that specific type given its fully qualified name: MyType, MyAssembly, Version=1.0.2.3, Culture=neutral, PublicKeyToken=b77a5c561934d069 It is used to verify the signature of the assembly to check that it was not tempered with after it was signed.Īll of these parameters together create, what is referred to as, a “Fully Qualified Name” of a. Public Key Token – A token generate from the public key that you have in your key pair.It is mainly used to create assembly (or satellite assemblies) that are culture specific such as a specific assembly which has resource string that contains German text instead of English text. Culture – The deafult value for this parameter in most assembly is “neutral” meaning, that this assembly is not culture specific.It can contain a fixed number which the developer / build machine will advance manually or have the “*” sign at the end so each build will increment it automatically. Assembly Version – The version of the assembly as defined in the AssemblyInfo file.Assembly Name – the file name of the assembly minus the “.dll” suffix.Strong signing an assembly gives the assembly a unique identifer which is composed out of the following parameters: The key pair is generated using the “sn.exe” utility and can be unique per assembly, per product or per publisher (depending on your needs). NET assembly loader actually works and how and where it searches for the assembly we want to load.Ī strongly signed assembly is an assembly that was signed using a key pair during compilation (or after it). That’s exactly the error I’m talking about.īefore we will go into common problems and how to resolve them, let us first understand how the. NET works and one simple tool, can be easily resolved in both development and production environments.ĭid you see the error “ File or assembly name XXX, or one of its dependencies, was not found” error (replace XXX with the relevant assembly name) before? While this is not hard core debugging that you would usually expect using WinDbg, CorDbg, MDbg and others, this is a very common case that with a little more information about how. NET Assembly loader does not find the right assembly to load and therefore doesn’t load it at all. I’m often being asked to resolve various problems in which the.
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