diff --git a/src/Termission.EtoForms/Forms/AboutForm.cs b/src/Termission.EtoForms/Forms/AboutForm.cs
index 69561bd..3b2de18 100644
--- a/src/Termission.EtoForms/Forms/AboutForm.cs
+++ b/src/Termission.EtoForms/Forms/AboutForm.cs
@@ -2,6 +2,7 @@
 using System.Reflection;
 using Eto.Drawing;
 using Eto.Forms;
+using Juniansoft.Termission.Core;
 using Juniansoft.Termission.EtoForms.Resources;
 
 namespace Juniansoft.Termission.EtoForms.Forms
@@ -10,7 +11,7 @@ public class AboutForm : Dialog
     {
         public AboutForm()
         {
-            var title = MainApplication.AssemblyProduct;
+            var title = App.AssemblyProduct;
 
             /* dialog attributes */
 
@@ -33,15 +34,15 @@ public AboutForm()
                 TextAlignment = TextAlignment.Center
             };
 
-            var version = MainApplication.AssemblyVersion;
+            var version = App.AssemblyVersion;
             var labelVersion = new Label
             {
                 Text = string.Format("Version {0}", version),
                 TextAlignment = TextAlignment.Center
             };
 
-            var copyright = MainApplication.AssemblyCopyright;
-            var company = MainApplication.AssemblyCompany;
+            var copyright = App.AssemblyCopyright;
+            var company = App.AssemblyCompany;
             var labelCopyright = new Label
             {
                 Text = $"{copyright} by {company}",
diff --git a/src/Termission.EtoForms/Forms/MainForm.cs b/src/Termission.EtoForms/Forms/MainForm.cs
index 6219769..a35d6f7 100644
--- a/src/Termission.EtoForms/Forms/MainForm.cs
+++ b/src/Termission.EtoForms/Forms/MainForm.cs
@@ -7,6 +7,7 @@
 using Juniansoft.Termission.Core.ViewModels;
 using Juniansoft.Termission.EtoForms.Views;
 using Juniansoft.MvvmReady;
+using Juniansoft.Termission.Core;
 
 namespace Juniansoft.Termission.EtoForms.Forms
 {
@@ -30,7 +31,7 @@ public MainForm()
             _mainView = ServiceLocator.Current.Get<MainView>();
             _mainVm = ServiceLocator.Current.Get<MainViewModel>();
 
-            Title = MainApplication.AssemblyProduct;
+            Title = App.AssemblyProduct;
             ClientSize = new Eto.Drawing.Size(720, 480);
             Style = EtoStyles.FormMain;
             Icon = DesktopAppResources.DevAppIcon;
diff --git a/src/Termission.EtoForms/MainApplication.cs b/src/Termission.EtoForms/MainApplication.cs
index 1d201c5..c189460 100644
--- a/src/Termission.EtoForms/MainApplication.cs
+++ b/src/Termission.EtoForms/MainApplication.cs
@@ -105,86 +105,5 @@ public void RegisterServices()
             ServiceLocator.Current.Register<DeviceBotView>();
             ServiceLocator.Current.Register<PreferencesView>();
         }
-
-        #region Assembly Attribute Accessors
-
-        public static string AssemblyTitle
-        {
-            get
-            {
-                object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyTitleAttribute), false);
-                if (attributes.Length > 0)
-                {
-                    AssemblyTitleAttribute titleAttribute = (AssemblyTitleAttribute)attributes[0];
-                    if (titleAttribute.Title != "")
-                    {
-                        return titleAttribute.Title;
-                    }
-                }
-                return System.IO.Path.GetFileNameWithoutExtension(Assembly.GetExecutingAssembly().CodeBase);
-            }
-        }
-
-        public static string AssemblyVersion
-        {
-            get
-            {
-                return Assembly.GetExecutingAssembly().GetName().Version.ToString();
-            }
-        }
-
-        public static string AssemblyDescription
-        {
-            get
-            {
-                object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyDescriptionAttribute), false);
-                if (attributes.Length == 0)
-                {
-                    return "";
-                }
-                return ((AssemblyDescriptionAttribute)attributes[0]).Description;
-            }
-        }
-
-        public static string AssemblyProduct
-        {
-            get
-            {
-                object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyProductAttribute), false);
-                if (attributes.Length == 0)
-                {
-                    return "";
-                }
-                return ((AssemblyProductAttribute)attributes[0]).Product;
-            }
-        }
-
-        public static string AssemblyCopyright
-        {
-            get
-            {
-                object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCopyrightAttribute), false);
-                if (attributes.Length == 0)
-                {
-                    return "";
-                }
-                return ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
-            }
-        }
-
-        public static string AssemblyCompany
-        {
-            get
-            {
-                object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCompanyAttribute), false);
-                if (attributes.Length == 0)
-                {
-                    return "";
-                }
-                return ((AssemblyCompanyAttribute)attributes[0]).Company;
-            }
-        }
-
-        #endregion
     }
 }
diff --git a/src/Termission.EtoForms/MenuCommands/AboutCommand.cs b/src/Termission.EtoForms/MenuCommands/AboutCommand.cs
index 0fe1599..725c799 100644
--- a/src/Termission.EtoForms/MenuCommands/AboutCommand.cs
+++ b/src/Termission.EtoForms/MenuCommands/AboutCommand.cs
@@ -4,14 +4,15 @@
 using System.Text;
 using System.Threading.Tasks;
 using Eto.Forms;
-
+using Juniansoft.Termission.Core;
+
 namespace Juniansoft.Termission.EtoForms.MenuCommands
 {
     public class AboutCommand: Command
     {
         public AboutCommand()
         {
-            this.MenuText = $"About {MainApplication.AssemblyProduct}";
+            this.MenuText = $"About {App.AssemblyProduct}";
             this.ToolBarText = "About";
             this.ToolTip = "About";
         }