[UIKit] The default UIDocViewController constructor is unusable, so prevent any usage.

src/UIKit/Compat.cs

@@ -9,6 +9,8 @@
 //
 
 using System;
+using System.ComponentModel;
+
 using CoreGraphics;
 using Foundation;
 using ObjCRuntime;
@@ -207,4 +209,19 @@ namespace UIKit {
 		}
 	}
 #endif
+
+#if !XAMCORE_5_0 && IOS
+	public partial class UIDocViewController {
+		[Obsolete ("Do not use; this constructor doesn't work.")]
+		[EditorBrowsable (EditorBrowsableState.Never)]
+		public UIDocViewController ()
+			: base (ThrowInvalidOperationException ())
+		{
+		}
+		static NSObjectFlag ThrowInvalidOperationException ()
+		{
+			throw new InvalidOperationException ("Do not call this constructor, it may crash the app.");
+		}
+	}
+#endif
 }

src/uikit.cs

@@ -28127,8 +28127,10 @@ namespace UIKit {
 	}
 
 	[NoWatch, NoTV, iOS (17, 0), MacCatalyst (17, 0)]
+	[DisableDefaultCtor] // It crashes the app.
 #if XAMCORE_5_0
 	[BaseType (typeof(UIViewController))]
+	[Abstract] // "UIDocumentViewController is an abstract base class that is meant to be subclassed."
 	interface UIDocumentViewController
 #else
 	[BaseType (typeof (UIViewController), Name = "UIDocumentViewController")]