Unstable unit test: System.Windows.Forms.Tests.ToolTipTests.ToolTip_SetToolTip_TabControl_DoesNotAddToolForTabControlItself

[LeafShi1]

Related #11227

Test

System.Windows.Forms.Tests.ToolTipTests.ToolTip_SetToolTip_TabControl_DoesNotAddToolForTabControlItself

Issue description

The case failed in X64 unit tests, the failure link:

• #20240413.23 • Enable nullability in DocumentInheritanceService
• #20240411.4 • [main] Update dependencies from dotnet/arcade (#11200)

Error Message:

• In X64 unit:
  • Assert.Equal() Failure: Values differ
    Expected: 2
    Actual: 0

Stack trace:

at System.Windows.Forms.Tests.ToolTipTests.ToolTip_SetToolTip_TabControl_DoesNotAddToolForTabControlItself() in D:\a\_work\1\s\src\System.Windows.Forms\tests\UnitTests\System\Windows\Forms\ToolTipTests.cs:line 887
at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)