ResourceManager Constructor (String, Assembly, Type)

Updated: October 2010

Initializes a new instance of the ResourceManager class that looks up resources contained in files derived from the specified root name using the given Assembly.

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

public ResourceManager(
	string baseName,
	Assembly assembly,
	Type usingResourceSet


Type: System.String
The root name of the resource file without its extension and along with any fully qualified namespace name. For example, the root name for the resource file named "MyApplication.MyResource.en-US.resources" is "MyApplication.MyResource".
Type: System.Reflection.Assembly
The main assembly for the resources.
Type: System.Type
The type of the custom ResourceSet to use. If null, the default runtime ResourceSet object is used.


usingResourceset is not a derived class of ResourceSet.


The baseName or assembly parameter is null.

The individual resource files should be contained in satellite assemblies with the invariant culture's .resources file contained in the main assembly. A satellite assembly is assumed to contain resources for a single culture specified in that assembly's manifest, and are loaded as necessary.

If the resource file identified by baseName cannot be found in assembly, the method instantiates a ResourceManager object, but the attempt to retrieve a specific resource throws an exception, typically a MissingManifestResourceException.

You can specify a ResourceSet implementation to be used. If you do not need a specific ResourceSet implementation but would like to use a custom resource file format, you should derive from the ResourceSet class, override the GetDefaultReader method, and pass that type to this constructor.


The usingResourceSet parameter is used to support your own resource format, and will commonly be null. This is different from the constructor that takes a Type only.

Platform Notes

Silverlight for Windows Phone Silverlight for Windows Phone

ResourceManager(String, Assembly, Type), throws NotSupportedException when the usingResourceSet parameter is null..


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.




October 2010

Expanded the baseName parameter description and the Remarks section.

Customer feedback.

Community Additions