How Can I Easily Inspect Function Return Values While Debugging in Visual Studio?

Easily view function return values ​​in Visual Studio debugging

Debugging function return values ​​can be tedious, especially when calling complex functions. For a given function, getting the value of the returned DataTable requires adding temporary variables, which can be inconvenient.

Visual Studio 2013 and above solutions

Fortunately, Visual Studio 2013 and later provide a convenient way to view the return value directly. You can now check the return value in the Automated Window, or use variables like $ReturnValue, $ReturnValue1, or $returnvalue (depending on the VS version) in the Watch/Immediate window.

To access the return value, set a breakpoint at the function call and step (F10) into the call. This will display the return value immediately after the function returns.

Visual Studio 2015 Instructions

Unfortunately, the ability to check return values ​​in Automation Window has been removed in Visual Studio 2015.

Reintroduced in Visual Studio 2017 and above

This feature was reintroduced in Visual Studio 2017 and remains in later versions, including Visual Studio 2022.

Accessing return values ​​in Visual Studio 2022

In Visual Studio 2022, the Watch window can use the $ReturnValue variable. However, the "return" statement must be added to the watch window before it is executed.

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