C# The error-handling mechanism is very good here, including the wrong approach, it is good

Packet : 49636982yccl.zip filelist
demo-notes.txt
InputValidation/
InputValidation/InputValidation (after)/
InputValidation/InputValidation (after)/App.ico
InputValidation/InputValidation (after)/AssemblyInfo.cs
InputValidation/InputValidation (after)/Form1.cs
InputValidation/InputValidation (after)/Form1.resx
InputValidation/InputValidation (after)/InputValidation.csproj
InputValidation/InputValidation (after)/InputValidation.csproj.user
InputValidation/InputValidation (after)/InputValidation.sln
InputValidation/InputValidation (after)/InputValidation.suo
InputValidation/InputValidation (before)/
InputValidation/InputValidation (before)/App.ico
InputValidation/InputValidation (before)/AssemblyInfo.cs
InputValidation/InputValidation (before)/Form1.cs
InputValidation/InputValidation (before)/Form1.resx
InputValidation/InputValidation (before)/InputValidation.csproj
InputValidation/InputValidation (before)/InputValidation.csproj.user
InputValidation/InputValidation (before)/InputValidation.sln
InputValidation/InputValidation (before)/InputValidation.suo
Semantics/
Semantics/App.ico
Semantics/AssemblyInfo.cs
Semantics/Class1.cs
Semantics/Class2.cs
Semantics/Class3.cs
Semantics/Form1.cs
Semantics/Form1.resx
Semantics/Semantics.csproj
Semantics/Semantics.csproj.user
Semantics/Semantics.sln
Semantics/Semantics.suo
StackWalk (VB)/
StackWalk (VB)/AssemblyInfo.vb
StackWalk (VB)/Form1.resx
StackWalk (VB)/Form1.vb
StackWalk (VB)/WindowsApplication1.sln
StackWalk (VB)/WindowsApplication1.suo
StackWalk (VB)/WindowsApplication1.vbproj
StackWalk (VB)/WindowsApplication1.vbproj.user
Tracing/
Tracing/App.config
Tracing/App.ico
Tracing/AssemblyInfo.cs
Tracing/bin/
Tracing/bin/Debug/
Tracing/bin/Debug/AppLog.txt
Tracing/bin/Debug/Tracing.exe
Tracing/bin/Debug/Tracing.exe.config
Tracing/bin/Debug/Tracing.pdb
Tracing/DataAccess.cs
Tracing/Form1.cs
Tracing/Form1.resx
Tracing/Globals.cs
Tracing/obj/
Tracing/obj/Debug/
Tracing/obj/Debug/temp/
Tracing/obj/Debug/TempPE/
Tracing/obj/Debug/Tracing.exe
Tracing/obj/Debug/Tracing.Form1.resources
Tracing/obj/Debug/Tracing.pdb
Tracing/obj/Debug/Tracing.projdata
Tracing/Tracing.csproj
Tracing/Tracing.csproj.user
Tracing/Tracing.sln
Tracing/Tracing.suo

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