How to Recursively Load Assemblies and Their Dependencies into a Separate AppDomain?

Loading Assemblies and Dependencies into a Separate AppDomain: A Recursive Approach

Loading assemblies with intricate dependencies into a new AppDomain can present challenges. Errors such as "Could not load file or assembly... or one of its dependencies" frequently occur because referenced assemblies aren't automatically loaded. This requires a manual, recursive loading process.

The solution involves these key steps:

1. AppDomain Creation: First, establish a new AppDomain:

   <code class="language-csharp"> AppDomainSetup setup = AppDomain.CurrentDomain.SetupInformation;
    setup.ApplicationBase = dir;
    AppDomain domain = AppDomain.CreateDomain("SomeAppDomain", null, setup);</code>

2. Loading the Main Assembly: Load the primary assembly using its AssemblyName:

   <code class="language-csharp"> domain.Load(AssemblyName.GetAssemblyName(path));</code>

3. Recursive Reference Resolution: Iterate through the references of the loaded assembly within the new AppDomain:

   <code class="language-csharp"> foreach (AssemblyName refAsmName in Assembly.ReflectionOnlyLoadFrom(path).GetReferencedAssemblies())
    {
     // Utilize a proxy object for cross-AppDomain access
     Type type = typeof(Proxy);
     var value = (Proxy)domain.CreateInstanceAndUnwrap(type.Assembly.FullName, type.FullName);
   
     // Load the referenced assembly in the target AppDomain
     value.GetAssembly(refAsmName.FullName);
    }</code>

4. Proxy Class for Cross-Domain Interaction: The Proxy class facilitates communication between AppDomains:

   <code class="language-csharp"> class Proxy : MarshalByRefObject
    {
     public Assembly GetAssembly(string assemblyPath)
     {
         try
         {
             return Assembly.LoadFile(assemblyPath);
         }
         catch (Exception)
         {
             return null;
         }
     }
    }</code>

This method ensures that all necessary dependencies are loaded recursively into the target AppDomain, preventing runtime errors and enabling successful assembly execution.

The above is the detailed content of How to Recursively Load Assemblies and Their Dependencies into a Separate AppDomain?. For more information, please follow other related articles on the PHP Chinese website!