fixes

...ternExample/CommandPatternApp/CalculatorCommandPattern.cs

CommandPatternExample/CommandPatternApp/Display.cs

CommandPatternExample/CommandPatternApp/OldCalculator.cs

CommandPatternExample/CommandPatternApp/Program.cs

.../CommandPatternApp/bin/Debug/net9.0/CommandPatternApp.dll

.../CommandPatternApp/bin/Debug/net9.0/CommandPatternApp.exe

.../CommandPatternApp/bin/Debug/net9.0/CommandPatternApp.pdb

...PatternApp/obj/CommandPatternApp.csproj.nuget.dgspec.json

...ernApp/obj/Debug/net9.0/CommandPatternApp.AssemblyInfo.cs

...j/Debug/net9.0/CommandPatternApp.AssemblyInfoInputs.cache

...mmandPatternApp.GeneratedMSBuildEditorConfig.editorconfig

...atternApp/obj/Debug/net9.0/CommandPatternApp.assets.cache

...g/net9.0/CommandPatternApp.csproj.CoreCompileInputs.cache

.../CommandPatternApp/obj/Debug/net9.0/CommandPatternApp.dll

...obj/Debug/net9.0/CommandPatternApp.genruntimeconfig.cache

.../CommandPatternApp/obj/Debug/net9.0/CommandPatternApp.pdb

...ernExample/CommandPatternApp/obj/Debug/net9.0/apphost.exe

...mandPatternApp/obj/Debug/net9.0/ref/CommandPatternApp.dll

...dPatternApp/obj/Debug/net9.0/refint/CommandPatternApp.dll

...dPatternExample/CommandPatternApp/obj/project.nuget.cache