diff --git a/integrationtests/scenarios/i001746-hard-legacy/before/SilverlightClassLibrary1/SilverlightClassLibrary1.csprojtemplate b/integrationtests/scenarios/i001746-hard-legacy/before/SilverlightClassLibrary1/SilverlightClassLibrary1.csprojtemplate
index 746b9303dc..7bc5c101b4 100644
--- a/integrationtests/scenarios/i001746-hard-legacy/before/SilverlightClassLibrary1/SilverlightClassLibrary1.csprojtemplate
+++ b/integrationtests/scenarios/i001746-hard-legacy/before/SilverlightClassLibrary1/SilverlightClassLibrary1.csprojtemplate
@@ -83,17 +83,58 @@
   <Choose>
     <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And $(TargetFrameworkVersion) == 'v4.0'">
       <ItemGroup>
-        <Reference Include="Castle.Core">
-          <HintPath>..\packages\Castle.Core\lib\net40-client\Castle.Core.dll</HintPath>
+        <Reference Include="System.IO">
+          <HintPath>..\packages\Microsoft.Bcl\lib\net40\System.IO.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+        <Reference Include="System.Runtime">
+          <HintPath>..\packages\Microsoft.Bcl\lib\net40\System.Runtime.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+        <Reference Include="System.Threading.Tasks">
+          <HintPath>..\packages\Microsoft.Bcl\lib\net40\System.Threading.Tasks.dll</HintPath>
           <Private>True</Private>
           <Paket>True</Paket>
         </Reference>
       </ItemGroup>
     </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And $(TargetFrameworkVersion) == 'v4.5'">
+    <When Condition="$(TargetFrameworkIdentifier) == 'Silverlight' And $(TargetFrameworkVersion) == 'v5.0'">
       <ItemGroup>
-        <Reference Include="Castle.Core">
-          <HintPath>..\packages\Castle.Core\lib\net45\Castle.Core.dll</HintPath>
+        <Reference Include="System.IO">
+          <HintPath>..\packages\Microsoft.Bcl\lib\sl5\System.IO.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+        <Reference Include="System.Runtime">
+          <HintPath>..\packages\Microsoft.Bcl\lib\sl5\System.Runtime.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+        <Reference Include="System.Threading.Tasks">
+          <HintPath>..\packages\Microsoft.Bcl\lib\sl5\System.Threading.Tasks.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+      </ItemGroup>
+    </When>
+  </Choose>
+  <Choose>
+    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5')">
+      <ItemGroup>
+        <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop">
+          <HintPath>..\packages\Microsoft.Bcl.Async\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+        <Reference Include="Microsoft.Threading.Tasks.Extensions">
+          <HintPath>..\packages\Microsoft.Bcl.Async\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+        <Reference Include="Microsoft.Threading.Tasks">
+          <HintPath>..\packages\Microsoft.Bcl.Async\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
           <Private>True</Private>
           <Paket>True</Paket>
         </Reference>
@@ -101,8 +142,18 @@
     </When>
     <When Condition="$(TargetFrameworkIdentifier) == 'Silverlight' And $(TargetFrameworkVersion) == 'v5.0'">
       <ItemGroup>
-        <Reference Include="Castle.Core">
-          <HintPath>..\packages\Castle.Core\lib\sl5\Castle.Core.dll</HintPath>
+        <Reference Include="Microsoft.Threading.Tasks.Extensions.Silverlight">
+          <HintPath>..\packages\Microsoft.Bcl.Async\lib\sl4\Microsoft.Threading.Tasks.Extensions.Silverlight.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+        <Reference Include="Microsoft.Threading.Tasks.Extensions">
+          <HintPath>..\packages\Microsoft.Bcl.Async\lib\sl4\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
+          <Private>True</Private>
+          <Paket>True</Paket>
+        </Reference>
+        <Reference Include="Microsoft.Threading.Tasks">
+          <HintPath>..\packages\Microsoft.Bcl.Async\lib\sl4\Microsoft.Threading.Tasks.dll</HintPath>
           <Private>True</Private>
           <Paket>True</Paket>
         </Reference>
diff --git a/integrationtests/scenarios/i001746-hard-legacy/before/SilverlightClassLibrary1/paket.references b/integrationtests/scenarios/i001746-hard-legacy/before/SilverlightClassLibrary1/paket.references
index 44a6e81d62..4d0b307cea 100644
--- a/integrationtests/scenarios/i001746-hard-legacy/before/SilverlightClassLibrary1/paket.references
+++ b/integrationtests/scenarios/i001746-hard-legacy/before/SilverlightClassLibrary1/paket.references
@@ -1 +1 @@
-Castle.Core
\ No newline at end of file
+microsoft.bcl.async
\ No newline at end of file
diff --git a/integrationtests/scenarios/i001746-hard-legacy/before/paket.dependencies b/integrationtests/scenarios/i001746-hard-legacy/before/paket.dependencies
index 6ecef6f786..fa7359bedb 100644
--- a/integrationtests/scenarios/i001746-hard-legacy/before/paket.dependencies
+++ b/integrationtests/scenarios/i001746-hard-legacy/before/paket.dependencies
@@ -2,4 +2,4 @@ redirects: off
 framework: net40, net45, sl5
 source https://www.nuget.org/api/v2
 
-nuget Castle.Core
\ No newline at end of file
+nuget microsoft.bcl.async v1.0.168
\ No newline at end of file