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Assembly.ReflectionOnlyLoad Method (String)

Loads an assembly into the reflection-only context, given its display name.

Namespace:  System.Reflection
Assembly:  mscorlib (in mscorlib.dll)

public static Assembly ReflectionOnlyLoad(
	string assemblyString


Type: System.String

The display name of the assembly, as returned by the AssemblyName.FullName property.

Return Value

Type: System.Reflection.Assembly
An Assembly object that represents the loaded assembly.


assemblyString is null.


assemblyString is an empty string ("").


assemblyString is not found.


assemblyString is found, but cannot be loaded.


assemblyString is not a valid assembly.


Version 2.0 or later of the common language runtime is currently loaded and assemblyString was compiled with a later version.

Dependencies are not automatically loaded into the reflection-only context.

You cannot execute code from an assembly loaded into the reflection-only context. To execute code, the assembly must be loaded into the execution context as well, using the Load method.

Whether certain permissions are granted or not granted to an assembly is based on evidence. The rules for assembly and security evidence merging are as follows:


Reflecting on executable files compiled in C++ might throw a FileLoadException. This is most likely caused by the C++ compiler stripping the relocation addresses or the .reloc section from your executable file. To preserve the .reloc address, specify /fixed:no when you are linking.

The reflection-only context is no different from other contexts. Assemblies that are loaded into the context can be unloaded only by unloading the application domain.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0