diff --git a/EduNetworkBuilder/ListBoxWindow.cs b/EduNetworkBuilder/ListBoxWindow.cs
index 1117869..d25df83 100644
--- a/EduNetworkBuilder/ListBoxWindow.cs
+++ b/EduNetworkBuilder/ListBoxWindow.cs
@@ -261,6 +261,8 @@ namespace EduNetworkBuilder
         {
             int selectedIndex = lbWindowData.SelectedIndex;
             string selected = "";
+            int topmost = lbWindowData.TopIndex;
+            int totalcount = lbWindowData.Items.Count;
             if (lbWindowData.SelectedIndex != -1)
                 selected = lbWindowData.Items[lbWindowData.SelectedIndex].ToString();
             lbWindowData.Items.Clear();
@@ -382,7 +384,10 @@ namespace EduNetworkBuilder
                 if(selected != null && selected != "")
                 {
                     if (selectedIndex >= 0 && selectedIndex < lbWindowData.Items.Count)
+                    {
                         lbWindowData.SelectedIndex = selectedIndex;
+                        lbWindowData.TopIndex = topmost;
+                    }
                 }
                 if(lbWindowData.SelectedIndex != -1)
                 {
@@ -454,8 +459,11 @@ namespace EduNetworkBuilder
                 }
                 if (selected != null && selected != "")
                 {
-                    if(selectedIndex >=0 && selectedIndex < lbWindowData.Items.Count)
+                    if (selectedIndex >= 0 && selectedIndex < lbWindowData.Items.Count)
+                    {
                         lbWindowData.SelectedIndex = selectedIndex;
+                        lbWindowData.TopIndex = topmost;
+                    }
                 }
                 if (lbWindowData.SelectedIndex != -1)
                 {