Add files via upload

tools/CalculatorToolCard.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace AppStore
+{
+    public class CalculatorToolCard : ToolCard
+    {
+        public CalculatorToolCard()
+        {
+            ToolName = "计算器";
+            try 
+            {
+                string iconPath = Path.Combine(Application.StartupPath, "img", "resource", "png", "Calculator.png");
+                if (File.Exists(iconPath))
+                {
+                    ToolIcon = Image.FromFile(iconPath);
+                }
+                else
+                {
+                    ToolIcon = SystemIcons.Application.ToBitmap();
+                }
+            }
+            catch
+            {
+                ToolIcon = SystemIcons.Application.ToBitmap();
+            }
+            this.ToolCardClicked += OnCalculatorCardClicked;
+            UpdateDisplay();
+        }
+
+        private void OnCalculatorCardClicked(object sender, EventArgs e)
+        {
+            var calculatorForm = new CalculatorForm();
+            calculatorForm.ShowDialog();
+        }
+    }
+}