diff --git a/Tests/IPAddressTests/IPAddressTests.nfproj b/Tests/IPAddressTests/IPAddressTests.nfproj
index 42e406d..26f97a8 100644
--- a/Tests/IPAddressTests/IPAddressTests.nfproj
+++ b/Tests/IPAddressTests/IPAddressTests.nfproj
@@ -37,7 +37,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.35\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\..\packages\nanoFramework.System.Text.2.0.0-preview.8\lib\nanoFramework.System.Text.dll</HintPath>
diff --git a/Tests/IPAddressTests/packages.config b/Tests/IPAddressTests/packages.config
index 79c91a3..15f37b6 100644
--- a/Tests/IPAddressTests/packages.config
+++ b/Tests/IPAddressTests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.35" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.10" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.8" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.47" targetFramework="netnano1.0" developmentDependency="true" />
diff --git a/Tests/IPAddressTests/packages.lock.json b/Tests/IPAddressTests/packages.lock.json
index 56a5458..97549a3 100644
--- a/Tests/IPAddressTests/packages.lock.json
+++ b/Tests/IPAddressTests/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.35, 2.0.0-preview.35]",
-        "resolved": "2.0.0-preview.35",
-        "contentHash": "l3LZs5zLeYKP+21DmVykOBWQvcLWOzgOls2JU6R2mRb2cz1+SitRCaEC5bTEJHs888JdHi3xWMVe3GkRzZ/2Lg=="
+        "requested": "[2.0.0-preview.39, 2.0.0-preview.39]",
+        "resolved": "2.0.0-preview.39",
+        "contentHash": "rkXOwaEq6GIm+dKZ7ICMrG23mln482vRXyDtaNfAeBpgGcgiuFJrbw7w0TTZ2DNhw1CUWlCWZZbXi6+/NHdpLg=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
diff --git a/Tests/NetworkHelperTests/NetworkHelperTests.nfproj b/Tests/NetworkHelperTests/NetworkHelperTests.nfproj
index 9fb1c9a..546a0fc 100644
--- a/Tests/NetworkHelperTests/NetworkHelperTests.nfproj
+++ b/Tests/NetworkHelperTests/NetworkHelperTests.nfproj
@@ -46,7 +46,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.35\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\..\packages\nanoFramework.System.Text.2.0.0-preview.8\lib\nanoFramework.System.Text.dll</HintPath>
@@ -61,7 +61,7 @@
       <HintPath>..\..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.10\lib\System.IO.Streams.dll</HintPath>
     </Reference>
     <Reference Include="System.Threading, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.System.Threading.2.0.0-preview.6\lib\System.Threading.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.System.Threading.2.0.0-preview.8\lib\netnano1.0\System.Threading.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/Tests/NetworkHelperTests/packages.config b/Tests/NetworkHelperTests/packages.config
index de6dcf8..940f5df 100644
--- a/Tests/NetworkHelperTests/packages.config
+++ b/Tests/NetworkHelperTests/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.35" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.10" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.8" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Threading" version="2.0.0-preview.6" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Threading" version="2.0.0-preview.8" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.47" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/Tests/NetworkHelperTests/packages.lock.json b/Tests/NetworkHelperTests/packages.lock.json
index e0d0430..92beb14 100644
--- a/Tests/NetworkHelperTests/packages.lock.json
+++ b/Tests/NetworkHelperTests/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.35, 2.0.0-preview.35]",
-        "resolved": "2.0.0-preview.35",
-        "contentHash": "l3LZs5zLeYKP+21DmVykOBWQvcLWOzgOls2JU6R2mRb2cz1+SitRCaEC5bTEJHs888JdHi3xWMVe3GkRzZ/2Lg=="
+        "requested": "[2.0.0-preview.39, 2.0.0-preview.39]",
+        "resolved": "2.0.0-preview.39",
+        "contentHash": "rkXOwaEq6GIm+dKZ7ICMrG23mln482vRXyDtaNfAeBpgGcgiuFJrbw7w0TTZ2DNhw1CUWlCWZZbXi6+/NHdpLg=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
@@ -22,9 +22,9 @@
       },
       "nanoFramework.System.Threading": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.6, 2.0.0-preview.6]",
-        "resolved": "2.0.0-preview.6",
-        "contentHash": "uhvgAc99ybx2lys5UU2WmIJGd9ARsThCjTNou4pksvz/HQfbk+9MqiKo3fUVuvq7S8412EMFh7+V5THwHWbQzA=="
+        "requested": "[2.0.0-preview.8, 2.0.0-preview.8]",
+        "resolved": "2.0.0-preview.8",
+        "contentHash": "NXC2Pqm+ohhFyL4wJczP7wT29JCPueDFG5mCpBvDfcEpJokThY1hovim3NJybX9T2n6NR8lhZ3fCzYKd0WMRuA=="
       },
       "nanoFramework.TestFramework": {
         "type": "Direct",
diff --git a/Tests/SocketTests/SocketTests.nfproj b/Tests/SocketTests/SocketTests.nfproj
index 99e0ee7..2a25bb2 100644
--- a/Tests/SocketTests/SocketTests.nfproj
+++ b/Tests/SocketTests/SocketTests.nfproj
@@ -40,7 +40,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.35\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\..\packages\nanoFramework.System.Text.2.0.0-preview.8\lib\nanoFramework.System.Text.dll</HintPath>
diff --git a/Tests/SocketTests/packages.config b/Tests/SocketTests/packages.config
index 79c91a3..15f37b6 100644
--- a/Tests/SocketTests/packages.config
+++ b/Tests/SocketTests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.35" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.10" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.8" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.47" targetFramework="netnano1.0" developmentDependency="true" />
diff --git a/Tests/SocketTests/packages.lock.json b/Tests/SocketTests/packages.lock.json
index 56a5458..97549a3 100644
--- a/Tests/SocketTests/packages.lock.json
+++ b/Tests/SocketTests/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.35, 2.0.0-preview.35]",
-        "resolved": "2.0.0-preview.35",
-        "contentHash": "l3LZs5zLeYKP+21DmVykOBWQvcLWOzgOls2JU6R2mRb2cz1+SitRCaEC5bTEJHs888JdHi3xWMVe3GkRzZ/2Lg=="
+        "requested": "[2.0.0-preview.39, 2.0.0-preview.39]",
+        "resolved": "2.0.0-preview.39",
+        "contentHash": "rkXOwaEq6GIm+dKZ7ICMrG23mln482vRXyDtaNfAeBpgGcgiuFJrbw7w0TTZ2DNhw1CUWlCWZZbXi6+/NHdpLg=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
diff --git a/nanoFramework.System.Net.nuspec b/nanoFramework.System.Net.nuspec
index 2279f4d..fbb7230 100644
--- a/nanoFramework.System.Net.nuspec
+++ b/nanoFramework.System.Net.nuspec
@@ -20,10 +20,10 @@ This package requires a target with System.Net v$nativeVersion$ (checksum $check
     <tags>nanoFramework C# csharp netmf netnf networking</tags>
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
-        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.35" />
+        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" />
         <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.8" />
         <dependency id="nanoFramework.System.Text" version="2.0.0-preview.8" />
-        <dependency id="nanoFramework.System.Threading" version="2.0.0-preview.6" />
+        <dependency id="nanoFramework.System.Threading" version="2.0.0-preview.8" />
         <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.10" />
       </group>
     </dependencies>
diff --git a/nanoFramework.System.Net/System.Net.nfproj b/nanoFramework.System.Net/System.Net.nfproj
index a38c0f4..12c2aad 100644
--- a/nanoFramework.System.Net/System.Net.nfproj
+++ b/nanoFramework.System.Net/System.Net.nfproj
@@ -133,7 +133,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.35\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.8\lib\nanoFramework.Runtime.Events.dll</HintPath>
@@ -145,7 +145,7 @@
       <HintPath>..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.10\lib\System.IO.Streams.dll</HintPath>
     </Reference>
     <Reference Include="System.Threading, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Threading.2.0.0-preview.6\lib\System.Threading.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Threading.2.0.0-preview.8\lib\netnano1.0\System.Threading.dll</HintPath>
     </Reference>
   </ItemGroup>
   <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
diff --git a/nanoFramework.System.Net/packages.config b/nanoFramework.System.Net/packages.config
index 41fc8e8..191648d 100644
--- a/nanoFramework.System.Net/packages.config
+++ b/nanoFramework.System.Net/packages.config
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.35" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
   <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.8" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.10" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.8" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Threading" version="2.0.0-preview.6" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Threading" version="2.0.0-preview.8" targetFramework="netnano1.0" />
   <package id="Nerdbank.GitVersioning" version="3.9.50" developmentDependency="true" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.Net/packages.lock.json b/nanoFramework.System.Net/packages.lock.json
index db99256..7cae349 100644
--- a/nanoFramework.System.Net/packages.lock.json
+++ b/nanoFramework.System.Net/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.35, 2.0.0-preview.35]",
-        "resolved": "2.0.0-preview.35",
-        "contentHash": "l3LZs5zLeYKP+21DmVykOBWQvcLWOzgOls2JU6R2mRb2cz1+SitRCaEC5bTEJHs888JdHi3xWMVe3GkRzZ/2Lg=="
+        "requested": "[2.0.0-preview.39, 2.0.0-preview.39]",
+        "resolved": "2.0.0-preview.39",
+        "contentHash": "rkXOwaEq6GIm+dKZ7ICMrG23mln482vRXyDtaNfAeBpgGcgiuFJrbw7w0TTZ2DNhw1CUWlCWZZbXi6+/NHdpLg=="
       },
       "nanoFramework.Runtime.Events": {
         "type": "Direct",
@@ -28,9 +28,9 @@
       },
       "nanoFramework.System.Threading": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.6, 2.0.0-preview.6]",
-        "resolved": "2.0.0-preview.6",
-        "contentHash": "uhvgAc99ybx2lys5UU2WmIJGd9ARsThCjTNou4pksvz/HQfbk+9MqiKo3fUVuvq7S8412EMFh7+V5THwHWbQzA=="
+        "requested": "[2.0.0-preview.8, 2.0.0-preview.8]",
+        "resolved": "2.0.0-preview.8",
+        "contentHash": "NXC2Pqm+ohhFyL4wJczP7wT29JCPueDFG5mCpBvDfcEpJokThY1hovim3NJybX9T2n6NR8lhZ3fCzYKd0WMRuA=="
       },
       "Nerdbank.GitVersioning": {
         "type": "Direct",