error when use SendKeys.SendWait

[pedromcrocha]

Description

after upgrade System.Drawing.Common from 9.0.11 to 10.0.0, SendKeys.SendWait throw exception 'The type initializer for 'System.Windows.Forms.SendKeys' threw an exception.'

Reproduction Steps

simple use SendKeys referencing System.Drawing.Common from 10.0.0

Expected behavior

not throw exception

Actual behavior

throw exception

Regression?

yes

Known Workarounds

dont upgrade to System.Drawing.Common 10.0.0

Impact

No response

Configuration

No response

Other information

No response

[h3xds1nz]

More descriptive issue content would be helpful. Better yet, a repro project to work with.

SendKeys is a WinForms, not a WPF class, thus it resides in the System.Windows.Forms assembly which has further dependency (newly) on System.Windows.Private.Core. Likely you're missing an assembly at runtime and therefore the type init fail.

[pedromcrocha]

try this repro https://github.com/pedromcrocha/sendkey_error.git

[lindexi]

The main exception is:

System.TypeInitializationException: The type initializer for 'System.Windows.Forms.SendKeys' threw an exception.
 ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ScaleHelper' threw an exception.
 ---> System.TypeLoadException: Could not load type 'System.Private.Windows.Core.OsVersion' from assembly 'System.Private.Windows.Core, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
   at System.Windows.Forms.ScaleHelper.<InitializeStatics>g__GetPerMonitorAware|8_1()
   at System.Windows.Forms.ScaleHelper.InitializeStatics()
   --- End of inner exception stack trace ---
   at System.Windows.Forms.ScaleHelper.get_InitialSystemDpi()
   at System.Windows.Forms.Control..ctor(Boolean autoInstallSyncContext)
   at System.Windows.Forms.SendKeys.SKWindow..ctor()
   at System.Windows.Forms.SendKeys..cctor()
   --- End of inner exception stack trace ---
   at System.Windows.Forms.SendKeys.SendWait(String keys)
   at sendkey_error.MainWindow.Button_Click(Object sender, RoutedEventArgs e) in C:\lindexi\Code\God\sendkey_error\sendkey_error\MainWindow.xaml.cs:line 27

Reference: dotnet/runtime#121615

https://developercommunity.visualstudio.com/t/Cannot-Load-Windows-Forms-Designer/10883224?sort=active&topics=windows+6.3.9600.0

Break by dotnet/winforms#12839

And I report this issues to dotnet/winforms#14145

---

@pedromcrocha Fixed by update the TargetFramework to .NET 10.

<TargetFramework>net10.0-windows10.0.19041.0</TargetFramework>

Or downgraded System.Drawing.Common package version to 9.0.x