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TypeFinder Sample (Get Type Information) 

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This sample provides a command-line interface to get information about types in the environment. Sometimes locating a specific type's namespace or DLL can be difficult, and once you locate the type, the documentation may be unavailable or out of date. This utility provides a simple way to determine what types are available, what module they are in, and what interfaces, methods, fields, properties, and events are available on the type. This sample also provides an introduction to reflection.

Security noteSecurity Note

This sample code is provided to illustrate a concept and should not be used in applications or Web sites, as it may not illustrate the safest coding practices. Microsoft assumes no liability for incidental or consequential damages should the sample code be used for purposes other than as intended.

Building and Running the Sample

To open the sample file in Solution Explorer

  1. Click Download Sample.

    The File Download message box appears.

  2. Click Open, and on the left column of the zip folder window, click Extract all files.

    The Extraction Wizard opens.

  3. Click Next. You can change the directory that the files will be extracted to, and then click Next again.

    Make sure that the Show extracted files check box is selected, and click Finish.

  4. Double-click the sample's .sln file.

    The sample solution is displayed in Solution Explorer. You might get a security warning that says the solution location is not trusted. Click OK to continue.

To build and run the sample from the development environment

  1. On the Build menu, click Build Solution, or press CTRL+SHIFT+B.

  2. Press F5 to run the sample.

To build and run the sample from the command line

  1. Type BUILD.bat.


    For more information, see Building from the Command Line (Visual J#).

  2. Type TypeFinder, and press ENTER.

  3. To find the location of each type with a word in its name, type TypeFinder word from the command line.

Classes and Technologies in the Sample

The following classes and technologies are used in this sample.

Class/Technology Description


Loads assemblies into the AppDomain so that they can be searched for types.


Gets types from the assembly or module for comparison to the search string.


Gets type information such as name, namespace, and members.


Finds information about properties in types.


Finds information about events in types.


Finds information about fields in types.


Finds information about methods in types.

Class/Technology Description


Used by the IndentedWriter sample type to output (to the console, by default) in a generic fashion.

Class/Technology Description


Used by the IndentedWriter sample type to create a string.


Used throughout the sample to find format strings, find substrings, uppercase strings, for example.

Class/Technology Description


Used by the sample to manage a list of strings.

Class/Technology Description


Used to create an instance of the RegistryKey type for a subkey of the LocalMachine key.


Used to read values from a key in the registry.

See Also

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