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We all know that the assembly can be queried for attributes using the GetCustomAttributes method. I want to use this to identify an extension module for my application. However, to avoid loading every assembly I prefer a defensive approach: using Assembly.ReflectionOnlyLoadFrom to get more details about an assembly (has it my ModuleAttribute?) if the ModuleAttribute is found, I will finally load it using Assembly.LoadFrom Unfortunately it seems that there is no way to get the attributes from an assembly, that is loaded into the reflection-only context: myAssembly.GetCustomAttributes(typeof(ModuleAttribute), false) fails with an InvalidOperationException It is illegal to reflect on the custom attributes of a Type loaded via ReflectionOnlyGetType and CustomAttributeData.GetCustomAttributes(myAssembly) fails with ReflectionTypeLoadException because of dependant assemblies not being loaded. So how to get the attributes without polluting my application domain with useless (maybe harmful) types by calling Assembly.LoadFrom the need to load all referenced assemblies the need for separate application domains (gave it a short try, smelled like even more PITA) ?

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