diff --git a/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj b/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
index d0ef0f7..844b3a5 100644
--- a/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
+++ b/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
@@ -30,16 +30,16 @@
       <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.52\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Benchmark, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Benchmark.2.0.0-preview.1\lib\netnano1.0\nanoFramework.Benchmark.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Benchmark.2.0.0-preview.2\lib\netnano1.0\nanoFramework.Benchmark.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Logging.2.0.0-preview.24\lib\netnano1.0\nanoFramework.Logging.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Logging.2.0.0-preview.28\lib\netnano1.0\nanoFramework.Logging.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Native, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Native.2.0.0-preview.24\lib\netnano1.0\nanoFramework.Runtime.Native.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Native.2.0.0-preview.25\lib\netnano1.0\nanoFramework.Runtime.Native.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.System.Collections, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Collections.2.0.0-preview.14\lib\netnano1.0\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Collections.2.0.0-preview.15\lib\netnano1.0\nanoFramework.System.Collections.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.18\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>
diff --git a/nanoFramework.System.Text.Benchmark/packages.config b/nanoFramework.System.Text.Benchmark/packages.config
index d576f1d..d8fbace 100644
--- a/nanoFramework.System.Text.Benchmark/packages.config
+++ b/nanoFramework.System.Text.Benchmark/packages.config
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.Benchmark" version="2.0.0-preview.1" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Benchmark" version="2.0.0-preview.2" targetFramework="netnano1.0" />
   <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.52" targetFramework="netnano1.0" />
-  <package id="nanoFramework.Logging" version="2.0.0-preview.24" targetFramework="netnano1.0" />
-  <package id="nanoFramework.Runtime.Native" version="2.0.0-preview.24" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Collections" version="2.0.0-preview.14" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Logging" version="2.0.0-preview.28" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Runtime.Native" version="2.0.0-preview.25" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Collections" version="2.0.0-preview.15" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Diagnostics.Stopwatch" version="2.0.0-preview.77" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.18" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.Text.Benchmark/packages.lock.json b/nanoFramework.System.Text.Benchmark/packages.lock.json
index e5a5a23..5ce7576 100644
--- a/nanoFramework.System.Text.Benchmark/packages.lock.json
+++ b/nanoFramework.System.Text.Benchmark/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.Benchmark": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.1, 2.0.0-preview.1]",
-        "resolved": "2.0.0-preview.1",
-        "contentHash": "4JU2Y7B0hSd0TTGwTIHri5gY0dRX6ynaw0qWWAMUK40HQ4sYjv9QjzlNtpKb+nSpnhxypAqWs2CDa85ND2bDVg=="
+        "requested": "[2.0.0-preview.2, 2.0.0-preview.2]",
+        "resolved": "2.0.0-preview.2",
+        "contentHash": "QQGCwJyFD9av+zk06cv5834DJzOpJQjiLU4ix6p35dradAAzXpO78GF8JU1D6ac7KatGML2s7K1fU3Dd5iUlMw=="
       },
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
@@ -16,21 +16,21 @@
       },
       "nanoFramework.Logging": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.24, 2.0.0-preview.24]",
-        "resolved": "2.0.0-preview.24",
-        "contentHash": "FVcYj9ttODjgvEYE/a3g4NvJ5s9BmgaSCowaqqAgrtKSU5p2RB1SkskP9KJFgyXug71a3Q/uaDgwO8EuaR1MfA=="
+        "requested": "[2.0.0-preview.28, 2.0.0-preview.28]",
+        "resolved": "2.0.0-preview.28",
+        "contentHash": "oJvH+oIgsWJ+QQXSswOOWnXdVEVCN/oeek9NEZC2UzihqF6KapsO2z5Rhk8MNQAk0FQGlk0yr39skW5rjarZ1w=="
       },
       "nanoFramework.Runtime.Native": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.24, 2.0.0-preview.24]",
-        "resolved": "2.0.0-preview.24",
-        "contentHash": "Now6efyS5UCQUBVO2bIcJin8m/gzH7W3/0NVwn++m9U3lh8JFr0G894Uz/FbjAPrRPckyNlrdDmXmlYau3uw4Q=="
+        "requested": "[2.0.0-preview.25, 2.0.0-preview.25]",
+        "resolved": "2.0.0-preview.25",
+        "contentHash": "/CXYVGa3HXrEA4JJ1lQsQtnczgA4W7exSqlyyWKxh29TLHPalll6Y5UoxsBmbRX0WDCWBmBZvdGNIaL3wLpuOA=="
       },
       "nanoFramework.System.Collections": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.14, 2.0.0-preview.14]",
-        "resolved": "2.0.0-preview.14",
-        "contentHash": "bD/aprDzvUS7UGXXnP1NxY2fVw2686gNtiDXt1CV3IMA6YKu7cGXdPXfO8RYDkPNkHJ8omuHNuyUaq0OhJH82g=="
+        "requested": "[2.0.0-preview.15, 2.0.0-preview.15]",
+        "resolved": "2.0.0-preview.15",
+        "contentHash": "yyTSBujvtMHe5IYK26Q4Ys3o19pmrzhYDUzRHgnKFZNcQYRUIfd1C9Vt2UBDPF3hjHQnIVtrnry+7Pp/U00U/g=="
       },
       "nanoFramework.System.Diagnostics.Stopwatch": {
         "type": "Direct",