https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.debuggertypeproxyattribute.targettypename?view=netframework-4.8.1&viewFallbackFrom=net-10.0
DebuggerTypeProxyAttribute.TargetTypeName Property (System.Diagnostics) | Microsoft Learn
Gets or sets the name of the target type.
property systemdiagnosticsmicrosoftlearn