Migrated the project to dotnet core 3.0

src/NotifyIconWpf/Interop/Point.cs

@@ -0,0 +1,20 @@
+using System.Runtime.InteropServices;
+
+namespace Hardcodet.Wpf.TaskbarNotification.Interop
+{
+    /// <summary>
+    /// Win API struct providing coordinates for a single point.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Point
+    {
+        /// <summary>
+        /// X coordinate.
+        /// </summary>
+        public int X;
+        /// <summary>
+        /// Y coordinate.
+        /// </summary>
+        public int Y;
+    }
+}