The exporter dropped PresentationFramework, System.Xaml, System.Windows.Forms
and System.Drawing from every project it wrote, whatever the assembly used,
while a second list held the remaining WPF assemblies behind a WPF check. The
SDK draws the line elsewhere: Microsoft.NET.Sdk.WindowsDesktop.props promotes
the nine _WpfCommonNetFxReference items to _SDKImplicitReference only when
UseWPF is set, System.Windows.Forms only when UseWindowsForms is, and
WindowsFormsIntegration only when both are. A XAML-only assembly therefore lost
a reference that nothing supplied, and a WPF application that also used Windows
Forms lost the Windows Forms references while the project only said UseWPF.
Following the SDK there makes WPF and Windows Forms independent rather than
alternatives, which is what the flags enum is for: an assembly can use both,
and then both properties have to be written. Where an assembly looks like more
than one kind of project, the web SDK wins the Sdk attribute, because
Microsoft.NET.Sdk.Web imports Microsoft.NET.Sdk and so carries the desktop
targets, while Microsoft.NET.Sdk.WindowsDesktop carries no web targets.
System.Drawing stays unconditional: Microsoft.NET.Sdk.BeforeCommon.targets adds
it for every .NETFramework target rather than only for Windows Forms ones, and
on .NET Core it ships in the Microsoft.NETCore.App reference pack.
Assisted-by: Claude:claude-opus-5[1m]:Claude Code
An exported WPF project listed PresentationCore next to the implicit
Windows Desktop framework reference, which is a duplicate reference
(MSB3243) or an unresolvable one (MSB3245) once the hint path stops
pointing anywhere. The target-pack filter that should have caught it
asks the assembly resolver, which answers by probing the shared
frameworks installed on the machine running the export - so the same
assembly exported from Linux, or from a Windows box without the
desktop runtime, produced a different project file. What the SDK adds
for UseWPF is a fixed list, so match it by name instead.
Assisted-by: Claude:claude-opus-5[1m]:Claude Code
Microsoft.NET.Sdk imports the Windows Desktop targets itself for .NET
Framework and for .NET 5 and later, and warns (NETSDK1137) about every
project that still names the separate SDK. Only .NET Core 3.x, where
those targets are not imported without a platform-suffixed moniker,
genuinely needs Microsoft.NET.Sdk.WindowsDesktop.
Assisted-by: Claude:claude-opus-5[1m]:Claude Code
A .NET 5 or later project that sets UseWPF or UseWindowsForms is
rejected outright (NETSDK1136) unless its target framework names the
Windows platform, so an exported WPF assembly produced a project that
could not build at all. The platform belongs to the assembly rather
than to WPF - TargetPlatformAttribute records it, SupportedOSPlatform
its minimum version - so the moniker follows the attributes wherever
they are present, and falls back to plain "windows" only for a desktop
project built before those attributes existed. Monikers older than
net5.0 take no platform suffix and must not grow one.
Assisted-by: Claude:claude-opus-5[1m]:Claude Code
The SDK-style writer only ever emitted EmbeddedResource items, so every other
item type the export produced never reached the project file. XAML recovered
from BAML lands in Page items: ILSpy wrote the .xaml files to disk and the
project referenced none of them, leaving an exported WPF project that cannot
rebuild.
Explicit items collide with the SDK's own globs - a UseWPF project globs
**/*.xaml into Page, and NETSDK1022 rejects the duplicate - so each include is
preceded by a remove of the same item type, the pattern the EmbeddedResource
path already uses. Setting EnableDefaultPageItems=false would work as well, but
it is WPF-specific and switches off a glob for the whole project, whereas the
remove is per item, applies to any item type, and keeps the SDK's item
definitions (XamlRuntime) in effect.
Assisted-by: Claude:claude-opus-5[1m]:Claude Code
* Make IProjectFileWriter implementations public and extensible
* Fix nullable error
* Fix delegate invocation to prevent race conditions
Refactored code to assign WriteCustomPropertyGroup and WriteCustomItemGroup delegates to local variables before null checks and invocation. This ensures thread safety by avoiding race conditions if the delegates are modified by other threads.
* Replace events with a GetCustomProperties virtual method
* Remove I prefix
- Set 'LogicalName' attribute for all decompiled resources. This makes it possible to correctly recompile projects with resource names that are not valid filenames.
- Set Generator and SubType properties for XAML files.
Siegfried Pammer
Jeremy Pritts
Peter Crabtree
Daniel Grunwald
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