diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs
index 310f1cd1..d316577f 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs
@@ -5,6 +5,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Windows;
 using System.Windows.Markup;
+using System.Security;
 
 // General Information about an assembly is controlled through the following 
 // set of attributes. Change these attribute values to modify the information
@@ -18,6 +19,10 @@ using System.Windows.Markup;
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 
+// Needed to enable xbap scenarios
+[assembly: AllowPartiallyTrustedCallers]
+
+
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from 
 // COM, set the ComVisible attribute to true on that type.
diff --git a/ExtendedWPFToolkitSolution_35/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs b/ExtendedWPFToolkitSolution_35/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs
index 4f2fc09b..4e89c8fc 100644
--- a/ExtendedWPFToolkitSolution_35/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs
+++ b/ExtendedWPFToolkitSolution_35/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs
@@ -5,6 +5,7 @@ using System.Runtime.InteropServices;
 using System.Windows;
 using System.Windows.Markup;
 using System;
+using System.Security;
 
 // General Information about an assembly is controlled through the following 
 // set of attributes. Change these attribute values to modify the information
@@ -18,6 +19,9 @@ using System;
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 
+// Needed to enable xbap scenarios
+[assembly: AllowPartiallyTrustedCallers]
+
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from 
 // COM, set the ComVisible attribute to true on that type.