From d13e4565d9ceb78199b26e797490be1e5b063822 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 21 Mar 2026 12:05:21 +0000
Subject: [PATCH 1/2] Initial plan


From 5057dce55359f37e18c0d3ddea5bf053076838f9 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 21 Mar 2026 12:24:27 +0000
Subject: [PATCH 2/2] Fix Dialog SchemeName reverting to Base; restore Dialog
 scheme when running

Co-authored-by: tig <585482+tig@users.noreply.github.com>
Agent-Logs-Url: https://github.com/gui-cs/Terminal.Gui/sessions/0ca8d90a-caee-43ac-bfbc-6e62aae4ed58
---
 Terminal.Gui/Views/DialogTResult.cs           |  8 ++++
 .../Views/DialogTests.cs                      | 39 +++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/Terminal.Gui/Views/DialogTResult.cs b/Terminal.Gui/Views/DialogTResult.cs
index 94f4d990ec..e18d73f658 100644
--- a/Terminal.Gui/Views/DialogTResult.cs
+++ b/Terminal.Gui/Views/DialogTResult.cs
@@ -354,6 +354,14 @@ private void SetStyle ()
     {
         if (IsRunning)
         {
+            // When running, restore to Dialog scheme only if it was set to Base by SetStyle
+            // (i.e., the scheme was not explicitly overridden before running, e.g. by
+            // MessageBox.ErrorQuery which sets SchemeName = "Error" before calling app.Run).
+            if (SchemeName == SchemeManager.SchemesToSchemeName (Schemes.Base))
+            {
+                SchemeName = SchemeManager.SchemesToSchemeName (Schemes.Dialog);
+            }
+
             Arrangement |= ViewArrangement.Movable | ViewArrangement.Resizable | ViewArrangement.Overlapped;
         }
         else
diff --git a/Tests/UnitTestsParallelizable/Views/DialogTests.cs b/Tests/UnitTestsParallelizable/Views/DialogTests.cs
index 5c64f21083..aa1f553741 100644
--- a/Tests/UnitTestsParallelizable/Views/DialogTests.cs
+++ b/Tests/UnitTestsParallelizable/Views/DialogTests.cs
@@ -412,6 +412,45 @@ public void ShadowStyle_Can_Be_Changed ()
         dialog.Dispose ();
     }
 
+    // Copilot
+    [Fact]
+    public void SchemeName_IsBase_WhenNotRunning ()
+    {
+        // When a Dialog is not running, it should use the Base scheme (not Dialog)
+        Dialog dialog = new ();
+
+        Assert.Equal (SchemeManager.SchemesToSchemeName (Schemes.Base), dialog.SchemeName);
+
+        dialog.Dispose ();
+    }
+
+    // Copilot
+    [Fact]
+    public void SchemeName_IsDialog_WhenRunning ()
+    {
+        using IApplication app = Application.Create ();
+        app.Init (DriverRegistry.Names.ANSI);
+
+        using Dialog dialog = new ();
+
+        string? schemeNameWhileRunning = null;
+
+        app.Iteration += AppOnIteration;
+        app.Run (dialog);
+        app.Iteration -= AppOnIteration;
+
+        Assert.Equal (SchemeManager.SchemesToSchemeName (Schemes.Dialog), schemeNameWhileRunning);
+
+        return;
+
+        void AppOnIteration (object? sender, EventArgs<IApplication?> e)
+        {
+            schemeNameWhileRunning = dialog.SchemeName;
+            app.Iteration -= AppOnIteration;
+            app.RequestStop ();
+        }
+    }
+
     [Fact]
     public void Text_Property ()
     {