diff --git a/WelsonJS.Toolkit/WelsonJS.Toolkit/ProcessUtils.cs b/WelsonJS.Toolkit/WelsonJS.Toolkit/ProcessUtils.cs
index fdf813f..d3fbe7b 100644
--- a/WelsonJS.Toolkit/WelsonJS.Toolkit/ProcessUtils.cs
+++ b/WelsonJS.Toolkit/WelsonJS.Toolkit/ProcessUtils.cs
@@ -27,7 +27,7 @@ namespace WelsonJS
 {
     public class ProcessUtils
     {
-        public static List<int> ProcessIDs = new List<int>();
+        public static List<Process> ProcessList = new List<Process>();
 
         public static string OpenFileDialog()
         {
@@ -48,12 +48,14 @@ namespace WelsonJS
 
         public static int Open(string filepath)
         {
+            int processId = -1;
+
             if (string.IsNullOrEmpty(filepath))
             {
                 filepath = OpenFileDialog();
                 if (string.IsNullOrEmpty(filepath))
                 {
-                    return -1;
+                    return processId;
                 }
             }
 
@@ -62,16 +64,13 @@ namespace WelsonJS
                 Process process = new Process();
                 process.StartInfo.FileName = filepath;
                 process.Start();
-
-                int processId = process.Id;
-                ProcessIDs.Add(processId);
-
-                return processId;
+                ProcessList.Add(process);
             }
-            catch
-            {
-                return -1;
+            catch {
+                processId = -1;
             }
+
+            return processId;
         }
 
         public static bool Close(int processId)
@@ -79,12 +78,13 @@ namespace WelsonJS
             try
             {
                 Process.GetProcessById(processId).CloseMainWindow();
-                return true;
             }
             catch
             {
                 return false;
             }
+
+            return true;
         }
     }
 }
diff --git a/WelsonJS.Toolkit/WelsonJS.Toolkit/Serialization/KVSerializer.cs b/WelsonJS.Toolkit/WelsonJS.Toolkit/Serialization/KVSerializer.cs
new file mode 100644
index 0000000..5107f3c
--- /dev/null
+++ b/WelsonJS.Toolkit/WelsonJS.Toolkit/Serialization/KVSerializer.cs
@@ -0,0 +1,28 @@
+using System.Collections.Generic;
+using System.Text;
+
+namespace WelsonJS.Serialization
+{
+    public class KVSerializer
+    {
+        private static Dictionary<string, string> dict = new Dictionary<string, string>();
+
+        public void Add(string key, string value)
+        {
+            dict[key] = value;
+        }
+
+        public override string ToString()
+        {
+            StringBuilder sb = new StringBuilder();
+
+            foreach (var x in dict)
+            {
+                sb.Append($"{x.Key}={x.Value}; ");
+            }
+            if (sb.Length > 0) sb.Length -= 2;
+
+            return sb.ToString();
+        }
+    }
+}
diff --git a/WelsonJS.Toolkit/WelsonJS.Toolkit/Toolkit.cs b/WelsonJS.Toolkit/WelsonJS.Toolkit/Toolkit.cs
index 51b016b..7cea066 100644
--- a/WelsonJS.Toolkit/WelsonJS.Toolkit/Toolkit.cs
+++ b/WelsonJS.Toolkit/WelsonJS.Toolkit/Toolkit.cs
@@ -34,6 +34,7 @@ using System.Runtime.InteropServices;
 using System.Text;
 using System.Windows.Forms;
 using WelsonJS.Cryptography;
+using WelsonJS.Serialization;
 
 namespace WelsonJS
 {
@@ -247,21 +248,25 @@ namespace WelsonJS
         public string GetImageSize(string srcfile)
         {
             int[] result = BitmapUtils.GetSize(srcfile);
-            int width = result[0];
-            int height = result[1];
 
-            return $"width={width}; height={height}";
+            var serializer = new KVSerializer();
+            serializer.Add("width", result[0].ToString());
+            serializer.Add("height", result[1].ToString());
+
+            return serializer.ToString();
         }
 
         [ComVisible(true)]
         public string GetImagePixel(string srcfile)
         {
             int[] result = BitmapUtils.GetSize(srcfile);
-            int red = result[0];
-            int green = result[1];
-            int blue = result[2];
 
-            return $"red={red}; green={green}; blue={blue}";
+            var serializer = new KVSerializer();
+            serializer.Add("red", result[0].ToString());
+            serializer.Add("green", result[1].ToString());
+            serializer.Add("blue", result[2].ToString());
+
+            return serializer.ToString();
         }
 
         [ComVisible(true)]
@@ -275,7 +280,5 @@ namespace WelsonJS
         {
             BitmapUtils.Crop(srcfile, dstfile, x, y, a, b);
         }
-
-
     }
 }