README.md

018 - Debugger display

DebuggerDisplay is an attribute that allows to define how does the object looks in the debugger. We can expose only those properties that we care about w/o the need of overriding .ToString(). But what about if we would like to redefine how does an object that we do not own?

We can use DebuggerDisplay attribute on assembly level, or use already prepared file that is delivered with Visual Studio's Debugger\Visualizer. If you look for autoexp.cs in Visual Studio folder you will find out buch of already predefined entries for DebuggerDisplay attribute. Just compile the file to a dll and restart VS and the debugger will be enriched with those definitions.

Docs: https://learn.microsoft.com/en-us/visualstudio/debugger/using-the-debuggerdisplay-attribute?view=vs-2022

[DebuggerDisplay("{Value != null ? Value.ToString() : Error}")]
public class Result<T>
{
    // other members
    public T? Value { get; }

    public string? Error { get; }
}

[assembly: DebuggerDisplay("{Value != null ? Value.ToString() : Error}", Target = typeof(Result<Delivery>))]