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Operator Overloading Sample (Visual Basic) 

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This solution illustrates the concepts and usage of overloaded operators, using U.S. Dollars and Euros as an example.

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.

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

  5. 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 run this sample

  • Press F5.


The sample consists of two classes, EURO, representing Euros, and USD, representing U.S. Dollars. Form1 acts as a test application for the two classes. Users can enter various values for USD, execute the operators, and convert USD to EURO.

The following programming techniques are demonstrated:

  • Overloaded operators. The USD class has these overloaded operators: constructor, +, -, *, /.

  • Narrowing and Widening operators. Both the EURO and USD classes have widening and narrowing conversion to and from Double.

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