Migrate all .NET Framework projects to .NET 8

[devin-ai-integration]

Migrate all .NET Framework projects to .NET 8

Summary

Migrates all 12 .NET Framework projects in this repository to .NET 8 (latest LTS), following the provided migration playbook. This is a large structural migration touching every project in the repo.

Projects migrated:

Project	From	To
WinForms/EqDemoWinFormsNet4	.NET 4.7.2	net8.0-windows
Wpf/EqDemoWpfNet4	.NET 4.7.2	net8.0-windows
WinForms/EqDemoWinFormsNet6	net6.0-windows	net8.0-windows
Wpf/EqDemoWpfNet6	net6.0-windows	net8.0-windows
AspNet4/Mvc/AdvancedSearch	.NET 4.8	ASP.NET Core 8.0
AspNet4/Mvc/DataFiltering	.NET 4.6.1	ASP.NET Core 8.0
AspNet4/Mvc/AdhocReporting	.NET 4.6.2	ASP.NET Core 8.0
AspNet4/Mvc/AdhocReportingMetaData	.NET 4.6.1	ASP.NET Core 8.0
AspNet4/Mvc/AdvancedSearch-Multilayered/FrontApp	.NET 4.6.1	ASP.NET Core 8.0
AspNet4/Mvc/AdvancedSearch-Multilayered/ServiceApp	.NET 4.6.1	ASP.NET Core 8.0
AspNet4/WebForms/AdvancedSearch	.NET 4.6.1 WebForms	ASP.NET Core 8.0
AspNet4/WebForms/VB.AdvancedSearch	VB.NET WebForms	ASP.NET Core 8.0 (C#)

Key technical changes:

• All .csproj files converted to SDK-style format
• Entity Framework 6 → Entity Framework Core 8.0.2
• ASP.NET MVC/WebForms → ASP.NET Core with middleware
• Global.asax → Program.cs + Startup.cs
• web.config → appsettings.json
• ConfigurationManager → IConfiguration (DI)
• HttpContext.Current → dependency injection
• OWIN Identity → ASP.NET Core Identity
• Korzh.EasyQuery upgraded to 7.4.0 (ASP.NET Core compatible)
• Old @Html.EqHighLightFor / @Html.PageNavigator helpers → ASP.NET Core tag helpers (<eq-highlight-text>, <eq-page-navigator>)

Updates since last revision

Build errors were discovered during local compilation and resolved:

• Fixed Microsoft.Data.SqlClient version: 5.2.0 → 5.2.2 (required by Korzh.DbUtils.SqlServer 1.4.3)
• Fixed Korzh.EasyQuery package name: MsSqlGate → SqlServerGate
• Removed old Identity infrastructure: Deleted obsolete IdentityModels.cs, Account/Manage view folders, and Views/Web.config files
• Fixed Identity registration: Changed AddDefaultIdentity → AddIdentity (AddDefaultIdentity not available in ASP.NET Core 8)
• Fixed EasyQuery session cache: UseSessionCache() → StoreQueryInCache = true (API changed in 7.4.0)
• Fixed DataFiltering views: Updated to use ASP.NET Core tag helpers and proper API methods
• Fixed VB.AdvancedSearch: Renamed .vbproj → .csproj (code is now C#)
• Removed duplicate Content items: SDK-style projects auto-include content files

Build status: 8 of 12 projects now compile successfully on Linux (WinForms/WPF projects require Windows to build).

Review & Testing Checklist for Human

⚠️ CRITICAL - This PR has been build-tested but NOT runtime-tested. The migration was performed on Linux where these Windows/.NET applications cannot run.

• Runtime testing required: Each application must be run on Windows to verify functionality. Build success does not guarantee runtime correctness.
• WinForms/WPF projects: 4 projects (WinForms Net4/Net6, WPF Net4/Net6) were not build-tested at all - they require Windows with Visual Studio to compile.
• Identity flows: AdhocReporting and AdhocReportingMetaData lost their custom AccountController/ManageController. Verify that ASP.NET Core Identity provides sufficient UI scaffolding or if custom pages are needed.
• EasyQuery API compatibility: Verify that Korzh.EasyQuery 7.4.0 API surface matches usage. Only compile-time errors were fixed - runtime behavior may differ.
• Database migrations: EF6 migrations were removed but no EF Core migrations were created. Database schema changes may be required.
• VB.AdvancedSearch rewrite: This project was completely rewritten from VB.NET to C#. Verify all functionality is preserved.
• Connection strings: All use (localdb)\MSSQLLocalDB which is Windows-only. CI/deployment may need different connection strings.

Test Plan Recommendation

For each project:

1. Run dotnet build on Windows - must succeed for all 12 projects
2. Run dotnet run - must start without errors
3. Navigate to the app in browser (for web apps)
4. Test core EasyQuery functionality (query builder, data filtering, export)
5. For Identity-enabled apps: test login/register/logout flows
6. Verify database seeding works correctly
7. Test any project-specific features

Notes

• Link to Devin run: https://app.devin.ai/sessions/f69dbc47c2b448839b727a8b4b62523e
• Requested by: @parkerduff
• This migration follows the standard .NET Framework → .NET 8 playbook
• All obsolete files (Global.asax, web.config, old migrations, etc.) have been removed
• The VB.NET WebForms project was converted to C# as part of the migration

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