Stop calling GetDpiForWindow because it isn't supported until Windows…

… 10.0.14393 or on Windows Server

.editorconfig

@@ -161,3 +161,6 @@ dotnet_diagnostic.IDE0059.severity = warning
 
 # CA1031: Do not catch general exception types
 dotnet_diagnostic.CA1031.severity = warning
+
+# CA1416: Validate platform compatibility
+dotnet_diagnostic.CA1416.severity = warning;

src/Techsola.InstantReplay/InstantReplayCamera.cs

@@ -221,10 +221,7 @@ private static void AddFrames(object? state)
                 throw new Win32Exception(lastError);
             }
 
-            var dpi = User32.GetDpiForWindow(window);
-            if (dpi == 0) return null; // This is what happens when the window handle becomes invalid.
-
-            return new(clientTopLeft.x, clientTopLeft.y, clientRect.right, clientRect.bottom, dpi);
+            return new(clientTopLeft.x, clientTopLeft.y, clientRect.right, clientRect.bottom);
         }
 
 #if !NET35

src/Techsola.InstantReplay/Native/User32.cs

@@ -99,13 +99,6 @@ public static WindowDeviceContextSafeHandle GetDC(IntPtr hWnd)
         [DllImport("user32.dll", EntryPoint = "GetDC")]
         private static extern IntPtr GetDC_PInvoke(IntPtr hWnd);
 
-        /// <summary>
-        /// <seealso href="https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getdpiforwindow"/>
-        /// </summary>
-        [DllImport("user32.dll")]
-        [SupportedOSPlatform("windows10.0.14393")]
-        public static extern uint GetDpiForWindow(IntPtr hwnd);
-
         /// <summary>
         /// <seealso href="https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-geticoninfo"/>
         /// </summary>

src/Techsola.InstantReplay/WindowMetrics.cs

@@ -8,15 +8,13 @@ private readonly struct WindowMetrics
             public readonly int ClientTop;
             public readonly int ClientWidth;
             public readonly int ClientHeight;
-            public readonly uint Dpi;
 
-            public WindowMetrics(int clientLeft, int clientTop, int clientWidth, int clientHeight, uint dpi)
+            public WindowMetrics(int clientLeft, int clientTop, int clientWidth, int clientHeight)
             {
                 ClientLeft = clientLeft;
                 ClientTop = clientTop;
                 ClientWidth = clientWidth;
                 ClientHeight = clientHeight;
-                Dpi = dpi;
             }
         }
     }