Answer
AppDomains offered isolation and unloading but were heavy and complex. .NET Core replaced them with AssemblyLoadContext for lighter, flexible loading and unloading models.
Quick Answer
AppDomains in .NET Framework provided process-level isolation for loading and unloading assemblies independently. They were complex, platform-specific (Windows only), and rarely used correctly. .NET Core removed them for simplicity and cross-platform support. AssemblyLoadContext is the lightweight replacement for dynamic, isolated assembly loading in plugins.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ