diff --git a/Tests/IPAddressTests/IPAddressTests.nfproj b/Tests/IPAddressTests/IPAddressTests.nfproj
index 26f97a8..7d8a250 100644
--- a/Tests/IPAddressTests/IPAddressTests.nfproj
+++ b/Tests/IPAddressTests/IPAddressTests.nfproj
@@ -49,7 +49,7 @@
       <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.47\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
     </Reference>
     <Reference Include="System.IO.Streams, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.10\lib\System.IO.Streams.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.12\lib\netnano1.0\System.IO.Streams.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/Tests/IPAddressTests/packages.config b/Tests/IPAddressTests/packages.config
index 15f37b6..02fc1b7 100644
--- a/Tests/IPAddressTests/packages.config
+++ b/Tests/IPAddressTests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <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.IO.Streams" version="2.0.0-preview.12" 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" />
 </packages>
\ No newline at end of file
diff --git a/Tests/IPAddressTests/packages.lock.json b/Tests/IPAddressTests/packages.lock.json
index 97549a3..88998d0 100644
--- a/Tests/IPAddressTests/packages.lock.json
+++ b/Tests/IPAddressTests/packages.lock.json
@@ -10,9 +10,9 @@
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.10, 2.0.0-preview.10]",
-        "resolved": "2.0.0-preview.10",
-        "contentHash": "6B4Q7OciuQm2ebEt8JqZvM4Eka0WgQYYlH73AmsNXDSn6G7Xw5ijJVVN2vIvu5qb2qda1Rpvxbmjp1ykk3hYKg=="
+        "requested": "[2.0.0-preview.12, 2.0.0-preview.12]",
+        "resolved": "2.0.0-preview.12",
+        "contentHash": "kkYmOuOQ2B4VorEIXy0bgzoa+gDERVVLML1tsM/x2ZjsResJjYzPsO7erLho+i2YGQwZ8lF7eWC7quj9SkWtlw=="
       },
       "nanoFramework.System.Text": {
         "type": "Direct",
diff --git a/Tests/NetworkHelperTests/NetworkHelperTests.nfproj b/Tests/NetworkHelperTests/NetworkHelperTests.nfproj
index 546a0fc..b4ef9b6 100644
--- a/Tests/NetworkHelperTests/NetworkHelperTests.nfproj
+++ b/Tests/NetworkHelperTests/NetworkHelperTests.nfproj
@@ -58,7 +58,7 @@
       <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.47\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
     </Reference>
     <Reference Include="System.IO.Streams, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.10\lib\System.IO.Streams.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.12\lib\netnano1.0\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.8\lib\netnano1.0\System.Threading.dll</HintPath>
diff --git a/Tests/NetworkHelperTests/packages.config b/Tests/NetworkHelperTests/packages.config
index 940f5df..e410d62 100644
--- a/Tests/NetworkHelperTests/packages.config
+++ b/Tests/NetworkHelperTests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <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.IO.Streams" version="2.0.0-preview.12" 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.8" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.47" targetFramework="netnano1.0" developmentDependency="true" />
diff --git a/Tests/NetworkHelperTests/packages.lock.json b/Tests/NetworkHelperTests/packages.lock.json
index 92beb14..33e3ab0 100644
--- a/Tests/NetworkHelperTests/packages.lock.json
+++ b/Tests/NetworkHelperTests/packages.lock.json
@@ -10,9 +10,9 @@
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.10, 2.0.0-preview.10]",
-        "resolved": "2.0.0-preview.10",
-        "contentHash": "6B4Q7OciuQm2ebEt8JqZvM4Eka0WgQYYlH73AmsNXDSn6G7Xw5ijJVVN2vIvu5qb2qda1Rpvxbmjp1ykk3hYKg=="
+        "requested": "[2.0.0-preview.12, 2.0.0-preview.12]",
+        "resolved": "2.0.0-preview.12",
+        "contentHash": "kkYmOuOQ2B4VorEIXy0bgzoa+gDERVVLML1tsM/x2ZjsResJjYzPsO7erLho+i2YGQwZ8lF7eWC7quj9SkWtlw=="
       },
       "nanoFramework.System.Text": {
         "type": "Direct",
diff --git a/Tests/SocketTests/SocketTests.nfproj b/Tests/SocketTests/SocketTests.nfproj
index 2a25bb2..bc6735e 100644
--- a/Tests/SocketTests/SocketTests.nfproj
+++ b/Tests/SocketTests/SocketTests.nfproj
@@ -52,7 +52,7 @@
       <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.47\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
     </Reference>
     <Reference Include="System.IO.Streams, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.10\lib\System.IO.Streams.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.12\lib\netnano1.0\System.IO.Streams.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/Tests/SocketTests/packages.config b/Tests/SocketTests/packages.config
index 15f37b6..02fc1b7 100644
--- a/Tests/SocketTests/packages.config
+++ b/Tests/SocketTests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <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.IO.Streams" version="2.0.0-preview.12" 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" />
 </packages>
\ No newline at end of file
diff --git a/Tests/SocketTests/packages.lock.json b/Tests/SocketTests/packages.lock.json
index 97549a3..88998d0 100644
--- a/Tests/SocketTests/packages.lock.json
+++ b/Tests/SocketTests/packages.lock.json
@@ -10,9 +10,9 @@
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.10, 2.0.0-preview.10]",
-        "resolved": "2.0.0-preview.10",
-        "contentHash": "6B4Q7OciuQm2ebEt8JqZvM4Eka0WgQYYlH73AmsNXDSn6G7Xw5ijJVVN2vIvu5qb2qda1Rpvxbmjp1ykk3hYKg=="
+        "requested": "[2.0.0-preview.12, 2.0.0-preview.12]",
+        "resolved": "2.0.0-preview.12",
+        "contentHash": "kkYmOuOQ2B4VorEIXy0bgzoa+gDERVVLML1tsM/x2ZjsResJjYzPsO7erLho+i2YGQwZ8lF7eWC7quj9SkWtlw=="
       },
       "nanoFramework.System.Text": {
         "type": "Direct",
diff --git a/nanoFramework.System.Net.nuspec b/nanoFramework.System.Net.nuspec
index fbb7230..12e08d5 100644
--- a/nanoFramework.System.Net.nuspec
+++ b/nanoFramework.System.Net.nuspec
@@ -21,10 +21,10 @@ This package requires a target with System.Net v$nativeVersion$ (checksum $check
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
         <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" />
-        <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.8" />
+        <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.10" />
         <dependency id="nanoFramework.System.Text" version="2.0.0-preview.8" />
         <dependency id="nanoFramework.System.Threading" version="2.0.0-preview.8" />
-        <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.10" />
+        <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.12" />
       </group>
     </dependencies>
   </metadata>
diff --git a/nanoFramework.System.Net/System.Net.nfproj b/nanoFramework.System.Net/System.Net.nfproj
index 12c2aad..0e308d9 100644
--- a/nanoFramework.System.Net/System.Net.nfproj
+++ b/nanoFramework.System.Net/System.Net.nfproj
@@ -136,13 +136,13 @@
       <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>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.10\lib\netnano1.0\nanoFramework.Runtime.Events.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>
     </Reference>
     <Reference Include="System.IO.Streams, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.10\lib\System.IO.Streams.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.12\lib\netnano1.0\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.8\lib\netnano1.0\System.Threading.dll</HintPath>
diff --git a/nanoFramework.System.Net/packages.config b/nanoFramework.System.Net/packages.config
index 191648d..b12ffc8 100644
--- a/nanoFramework.System.Net/packages.config
+++ b/nanoFramework.System.Net/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <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.Runtime.Events" version="2.0.0-preview.10" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.12" 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.8" targetFramework="netnano1.0" />
   <package id="Nerdbank.GitVersioning" version="3.9.50" developmentDependency="true" targetFramework="netnano1.0" />
diff --git a/nanoFramework.System.Net/packages.lock.json b/nanoFramework.System.Net/packages.lock.json
index 7cae349..ce06b00 100644
--- a/nanoFramework.System.Net/packages.lock.json
+++ b/nanoFramework.System.Net/packages.lock.json
@@ -10,15 +10,15 @@
       },
       "nanoFramework.Runtime.Events": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.8, 2.0.0-preview.8]",
-        "resolved": "2.0.0-preview.8",
-        "contentHash": "+ELISV4zHeqzHrYirnx47zsAA7MPbBMWJQudbQv5almh22bTviDzFbOML3Dim8lCZZeaARnJers1gPmJ4ODT7Q=="
+        "requested": "[2.0.0-preview.10, 2.0.0-preview.10]",
+        "resolved": "2.0.0-preview.10",
+        "contentHash": "sibvphHl7uVwM6tYIBfUVB29ejHcBMU8bsiZM4r+x4ijW2UMf1DVAjceqgg0W3zhmoHPxq7uzxKCNFiiXXwD3g=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.10, 2.0.0-preview.10]",
-        "resolved": "2.0.0-preview.10",
-        "contentHash": "6B4Q7OciuQm2ebEt8JqZvM4Eka0WgQYYlH73AmsNXDSn6G7Xw5ijJVVN2vIvu5qb2qda1Rpvxbmjp1ykk3hYKg=="
+        "requested": "[2.0.0-preview.12, 2.0.0-preview.12]",
+        "resolved": "2.0.0-preview.12",
+        "contentHash": "kkYmOuOQ2B4VorEIXy0bgzoa+gDERVVLML1tsM/x2ZjsResJjYzPsO7erLho+i2YGQwZ8lF7eWC7quj9SkWtlw=="
       },
       "nanoFramework.System.Text": {
         "type": "Direct",