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Nullable Sample 

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This sample demonstrates how to use nullable types. This feature allows value types to have an uninitialized, or empty, state similar to how reference types can be set to null.

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.

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 Nullable Code sample within Visual Studio

  1. Open Nullable.sln, the solution file, either by double-clicking on the file from Windows Explorer, or by clicking Open on the File menu.

  2. On the Debug menu, click Start Without Debugging.

To build and run the Nullable Code sample from the command line

  1. Use the Change Directory (cd) command to change to the \Boxing, \Basics, or \Operator subdirectory under the Nullable directory.

  2. For the Boxing sample, type the following:

    csc Boxing.cs
    Boxing
    

    For the Basics sample, type the following:

    csc Basics.cs
    Basics
    

    For the Operator sample, type the following:

    csc Operator.cs
    Operator
    

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