Tobias Käs

**Is your feature request related to a problem? Please describe.** During PR review it [was noted](https://github.com/dotnet/winforms/pull/3532#discussion_r449221086) that there is likely little test coverage of printing support of Controls. Printers typically...

Reduce sharing of disposable objects across MemberData sets

1

**.NET Core Version:** master **Have you experienced this same bug with .NET Framework?:** no **Problem description:** During investigation of flaky unit tests it was noticed that sharing disposable objects between...

Flaky Clipboard Unit Tests

7

**.NET Core Version:** master **Have you experienced this same bug with .NET Framework?:** no **Problem description:** [Noticed](https://github.com/dotnet/winforms/pull/1932#issuecomment-644700150) as a flaky test: > System.Windows.Forms.Tests.TextBoxBaseTests.TextBoxBase_Paste_InvokeNotEmpty_Success [FAIL] Assert.Equal() Failure  (pos 1) Expected:...

Reduce UI test congestion

2

**Is your feature request related to a problem? Please describe.** Looking at dumps of test runs (e.g. during #3358) or breaking test runs in a debugger it appears there are...

CurrentCulture in unit tests?

10

While updating the PaddingConverter tests in PR #2679 I noticed that it contains tests which only succeed on english (or similar) environments which use comma as separator. Some languages use...

Clipboard.ContainsImage inconsistent with Clipboard.GetImage

8

In #493 it was decided that removing metafile support from `Clipboard.GetImage` is by design. However `Clipboard.SetImage` and `Clipboard.ContainsImage` were never adjusted and still support metafiles, this leads to an inconsistent...

**Is your feature request related to a problem? Please describe.** `ListView.BackgroundImage` is stored into a temporary file when transferred to the native control. This puts pressure on the temp file...

**.NET Core Version:** all .NET Core and Desktop Framework **Have you experienced this same bug with .NET Framework?:** Yes **Problem description:** Loading a cursor making use of alpha transparency by...

ImportMany failure at runtime instead of composition time

4

Consider the following scenario having ImportMany over mixed scoped/unscoped exports ```C# public interface IMessageHandler { } [Export(typeof(IMessageHandler))] public class UniqueMessageHandler : IMessageHandler { } [Export(typeof(IMessageHandler))] [Shared] public class GlobalMessageHandler :...

DragDrop unit tests hang, should be integration tests

3

**.NET Core Version:** master **Have you experienced this same bug with .NET Framework?:** not applicable **Problem description:** DoDragDrop tests in ToolStripItemTests and ControlTests are hanging CI. Not sure if its...