diff --git a/Order/OrderVM.vb b/Order/OrderVM.vb
index 8a1ed35..8d46136 100644
--- a/Order/OrderVM.vb
+++ b/Order/OrderVM.vb
@@ -66,10 +66,18 @@ Public Class OrderVM
       End Get
    End Property
 
+   Private Function VerifyNotIsNothing() As Boolean
+      If IsNothing(Map.refAssemblyManagerVM.CurrProject.SelAssemblyName) OrElse
+         IsNothing(Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly) OrElse
+         Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor.Count > 0 Then
+         Return False
+      End If
+      Return True
+   End Function
+
    Public Property Customer As String
       Get
-         If IsNothing(Map.refAssemblyManagerVM.CurrProject.SelAssemblyName) AndAlso
-            Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor.Count > 0 Then Return Nothing
+         If Not VerifyNotIsNothing() Then Return Nothing
          Return Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor(0).Door.Customer
       End Get
       Set(value As String)
@@ -83,8 +91,7 @@ Public Class OrderVM
 
    Public Property Elevation As String
       Get
-         If IsNothing(Map.refAssemblyManagerVM.CurrProject.SelAssemblyName) AndAlso
-            Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor.Count > 0 Then Return Nothing
+         If Not VerifyNotIsNothing() Then Return Nothing
          Return Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor(0).Door.Elevation
       End Get
       Set(value As String)
@@ -98,8 +105,7 @@ Public Class OrderVM
 
    Public Property Project As String
       Get
-         If IsNothing(Map.refAssemblyManagerVM.CurrProject.SelAssemblyName) AndAlso
-            Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor.Count > 0 Then Return Nothing
+         If Not VerifyNotIsNothing() Then Return Nothing
          Return Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor(0).Door.Project
       End Get
       Set(value As String)
@@ -113,8 +119,7 @@ Public Class OrderVM
 
    Public Property PO As String
       Get
-         If IsNothing(Map.refAssemblyManagerVM.CurrProject.SelAssemblyName) AndAlso
-            Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor.Count > 0 Then Return Nothing
+         If Not VerifyNotIsNothing() Then Return Nothing
          Return Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor(0).Door.PO
       End Get
       Set(value As String)
@@ -128,8 +133,7 @@ Public Class OrderVM
 
    Public Property Line As String
       Get
-         If IsNothing(Map.refAssemblyManagerVM.CurrProject.SelAssemblyName) AndAlso
-            Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor.Count > 0 Then Return Nothing
+         If Not VerifyNotIsNothing() Then Return Nothing
          Return Map.refAssemblyManagerVM.CurrProject.SelAssemblyName.SelAssembly.ListPartDoor(0).Door.Line
       End Get
       Set(value As String)