Activators Dotnet 4.6.1 ›
| Error | Likely cause | Fix | |-------|--------------|-----| | MissingMethodException | No default constructor | Add public Sample() | | FileNotFoundException | Assembly not loaded | Use full type name with assembly | | TypeLoadException | .NET version mismatch | Set <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion> in .csproj |
if the type cannot be instantiated (e.g., it's an abstract class). Microsoft Learn Performance : Repeated use of Activator.CreateInstance is slower than using the activators dotnet 4.6.1
, which looks for a matching constructor based on the arguments provided. 1. Instantiating by Type If you have the | Error | Likely cause | Fix |
// For types without a public parameterless ctor, Activator fails. // Workaround: FormatterServices.GetUninitializedObject object obj = FormatterServices.GetUninitializedObject(myType); // Then manually set fields via reflection. Instantiating by Type If you have the //
Note: Activator itself doesn't directly call private constructors; you need the constructor's Invoke method.
: Recommended for environments without internet access or for deploying to multiple machines. This package contains all required components [11, 23]. Developer Pack