Fix UpDownBase control for dark mode.

KlausLoeffelmann · KlausLoeffelmann · commit a5a940149fa7 · 2025-07-20T21:19:05.000-07:00
diff --git a/src/System.Windows.Forms/System/Windows/Forms/Controls/UpDown/UpDownBase.cs b/src/System.Windows.Forms/System/Windows/Forms/Controls/UpDown/UpDownBase.cs
@@ -215,6 +215,10 @@ protected override CreateParams CreateParams
     {
         get
         {
+#pragma warning disable WFO5001 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.
+            SetStyle(ControlStyles.ApplyThemingImplicitly, true);
+#pragma warning restore WFO5001 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.
+
             CreateParams cp = base.CreateParams;
 
             cp.Style &= ~(int)WINDOW_STYLE.WS_BORDER;

Original file line number	Diff line number	Diff line change
`@@ -215,6 +215,10 @@ protected override CreateParams CreateParams`
`215`	`215`	`{`
`216`	`216`	`get`
`217`	`217`	`{`
	`218`	`+#pragma warning disable WFO5001 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.`
	`219`	`+ SetStyle(ControlStyles.ApplyThemingImplicitly, true);`
	`220`	`+#pragma warning restore WFO5001 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.`
	`221`	`+`
`218`	`222`	`CreateParams cp = base.CreateParams;`
`219`	`223`
`220`	`224`	`cp.Style &= ~(int)WINDOW_STYLE.WS_BORDER;`