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Assembly.LoadWithPartialName Method (String)

Updated: July 2010

NOTE: This API is now obsolete. The non-obsolete alternative is Load().

Loads an assembly from the application directory or from the global assembly cache using a partial name.

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

[ObsoleteAttribute("This method has been deprecated. Please use Assembly.Load() instead.")]
public static Assembly LoadWithPartialName(
	string partialName


Type: System.String

The display name of the assembly.

Return Value

Type: System.Reflection.Assembly
The loaded assembly. If partialName is not found, this method returns null.


The partialName parameter is null.


assemblyFile is not a valid assembly.


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

Applications that load assemblies with this method will be affected by upgrades of those assemblies. Therefore, do not use this method; redesign the application to use the Load(String) method overload or the LoadFrom(String) method overload.

This method first calls Load. If the assembly is not found, this method returns the assembly from the global assembly cache that has the same simple name, and the highest version number.

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: 1.1, 1.0
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2




July 2010

Removed unnecessary permissions.

Customer feedback.

July 2010

Corrected the exception thrown when partialName is null.

Customer feedback.