添加.net core版本

src/LosslessZoom.Core/ComboxItem.cs

@@ -0,0 +1,8 @@
+namespace LosslessZoom.Core
+{
+    public class ComboxItem
+    {
+        public string Id { get; set; }
+        public string Name { get; set; }
+    }
+}

src/LosslessZoom.Core/FormAbout.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Reflection;
+using Sunny.UI;
+
+namespace LosslessZoom.Core
+{
+    public partial class FormAbout : UIForm
+    {
+        public FormAbout()
+        {
+            InitializeComponent();
+        }
+
+        private void FormAbout_Load(object sender, EventArgs e)
+        {
+            lblxAuthor.Text = @"https://github.com/X-Lucifer";
+            lblxDesc.Text = @"AI无损放大工具";
+            lblxVersion.Text = Assembly.GetExecutingAssembly().GetName().Version?.ToString();
+            lblxCopyright.Text = Assembly.GetExecutingAssembly().GetCustomAttribute<AssemblyCopyrightAttribute>()?.Copyright;
+        }
+
+    }
+}