


How Can I Safely Load, Locate, and Execute a Class Method from a Dynamically Loaded Assembly?
Jan 21, 2025 am 02:14 AMDynamic Assembly Loading, Class Location, and Method Invocation: A Robust Approach
Loading assemblies, locating classes, and invoking methods dynamically presents unique challenges. This article details a secure and efficient method for accomplishing this task.
The common approach of directly loading a DLL and accessing its classes often leads to casting errors. A superior solution leverages the power of AppDomains.
AppDomain Isolation: A Safer and More Flexible Method
Rather than directly loading the assembly, encapsulate it within its own AppDomain. This offers enhanced security and control.
The improved code example:
var domain = AppDomain.CreateDomain("NewDomainName"); var t = typeof(TypeIWantToLoad); var runnable = domain.CreateInstanceFromAndUnwrap(@"C:\myDll.dll", t.Name) as IRunnable; if (runnable == null) throw new Exception("broke"); runnable.Run();
Here's a breakdown:
- AppDomain Creation: Creates an isolated AppDomain, preventing conflicts and enhancing security.
- TypeIWantToLoad: Specifies the type (class) to load.
- CreateInstanceFromAndUnwrap: Creates an instance of the specified class within the new AppDomain and unwraps it for use in the main domain.
Advantages of AppDomain Usage
Employing AppDomains provides:
- Enhanced Security: Isolates assemblies, reducing the risk of conflicts and security breaches.
- Improved Flexibility: Allows dynamic loading and unloading of assemblies, providing fine-grained control.
- Customizable Execution Environments: AppDomains support customized resource allocation, permissions, and security settings.
Advanced Techniques: Managed Add-ins Framework
For advanced scenarios requiring more control over dynamic loading and unloading, the Managed Add-ins Framework (System.AddIn namespace) offers a robust and powerful solution for managing add-ins and extensions.
The above is the detailed content of How Can I Safely Load, Locate, and Execute a Class Method from a Dynamically Loaded Assembly?. For more information, please follow other related articles on the PHP Chinese website!

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