Epica3055

Fixes #11243 ## Screenshots ### Before  ### After  ## Test methodology - - manually and unit test -

DateTimePicker's Text Property

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**Issue description** The text property of datetimepicker is empty string before datetimepicker's handle is created. **Target framework** - [ ] .NET Core **Details** This behavior is caused by this pr...

fix issue 11450 Color contrast ratio of focus indicator over 'toolStripSplitButton1' is 1.247:1 which is less than 3:1: A11y_.NET CoreWinforms_StripControls_Toolstripwithmenuitem_NonTextContrast

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Fixes #11450 ## Proposed changes - - Remove RenderMode - ## Screenshots ### Before  ### After  ## Test environment(s) 9.0.0-preview.6.24305.2 ###### Microsoft Reviewers: [Open in CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/dotnet/winforms/pull/11502)

fix winforms-designer/issues/2707 The comboBox incorrect display on form designer when setting its DropDownStyle as Simple after building the project

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Fixes [designer/issues/2707](https://github.com/microsoft/winforms-designer/issues/2707) ## Root Cause We use `_requestedHeight` to set the height of a ComboBox when `DropDownStyle` is `ComboBoxStyle.Simple` https://github.com/dotnet/winforms/blob/70a6a7b4a9af452160e636838f946b3f4327383c/src/System.Windows.Forms/src/System/Windows/Forms/Controls/ComboBox/ComboBox.cs#L61-L63 Let's go through the repro steps that was described here...

fix #12365 [Accessibility] The text "Document does not contain any pages" in printPreviewControl has low color contrast

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Fixes #12365 ## Proposed changes - - Change the text color to black - ## Regression? - No ## Risk - low ## Screenshots ### Before  ### After ...

fix #12358 [HDPI] The "document" text in the “Generating Previews” dialog is truncated at >200% DPI

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Fixes #12358 ## Proposed changes - - Make the indicator's width wider. - ## Regression? - Yes ## Risk - low ## Screenshots ### Before  ### After  ...

fix issue #5961 Row header border line of the DataGridView control has very low luminosity contrast ratio

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Fixes #5961 ## Proposed changes - - use a different color when RightToLeft is set to Yes - - ## Regression? - Yes ## Screenshots ### Before  ### After...

fix issue #13648 DemoConsole app: The extra number displayed on Name & Text Propeties for the ToolStrip control

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Fixes #13648 ## Proposed changes - - We need to match the exact type name shouldn't just use StartsWith since we removed type check in [pr13573](https://github.com/dotnet/winforms/pull/13573) - ```diff while (i...

fix #13624 DemoConsole app: An exception pops up when focusing on "Type Here" in contextMenuStrip under DarkMode

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Fix #13624 ## Root cause System.NulIReferenceException in line 566. This happens here because when in DarkMode we use ToolStripSystemDarkModeRenderer do the rendering work. ## Proposed changes - - add null...

Add shortCut copy paste In DemoConsole

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Fixes #10466 ## Root cause Copy and paste now works in DemoConsole in netframework481 but not in net10. that's because the serializer here does not work in net10, it was...