diff --git a/Tests/NFUnitTestEncoding/NFUnitTestEncoding.nfproj b/Tests/NFUnitTestEncoding/NFUnitTestEncoding.nfproj
index e29e817..6b41d0a 100644
--- a/Tests/NFUnitTestEncoding/NFUnitTestEncoding.nfproj
+++ b/Tests/NFUnitTestEncoding/NFUnitTestEncoding.nfproj
@@ -32,13 +32,13 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.43\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.49\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.TestFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.49\lib\nanoFramework.TestFramework.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.52\lib\nanoFramework.TestFramework.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.UnitTestLauncher, Version=0.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.49\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
+      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.52\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/Tests/NFUnitTestEncoding/packages.config b/Tests/NFUnitTestEncoding/packages.config
index b26279b..c556982 100644
--- a/Tests/NFUnitTestEncoding/packages.config
+++ b/Tests/NFUnitTestEncoding/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" targetFramework="netnano1.0" />
-  <package id="nanoFramework.TestFramework" version="4.0.0-preview.49" targetFramework="netnano1.0" developmentDependency="true" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" targetFramework="netnano1.0" />
+  <package id="nanoFramework.TestFramework" version="4.0.0-preview.52" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/Tests/NFUnitTestEncoding/packages.lock.json b/Tests/NFUnitTestEncoding/packages.lock.json
index 2dd3f26..21955ba 100644
--- a/Tests/NFUnitTestEncoding/packages.lock.json
+++ b/Tests/NFUnitTestEncoding/packages.lock.json
@@ -4,15 +4,15 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.43, 2.0.0-preview.43]",
-        "resolved": "2.0.0-preview.43",
-        "contentHash": "ijOdswxNI+zhN7MrRMjJPe7pAVhqARvpEOFKUKH6D18NUS3CCQ9+IoyVs3zJhmmBk53YmAErFAdCnAWLVxUu8Q=="
+        "requested": "[2.0.0-preview.49, 2.0.0-preview.49]",
+        "resolved": "2.0.0-preview.49",
+        "contentHash": "/8/fw1qqEql05aelTR9QQi4ZF2M+Mdwuemjf9rul8yaOpl6jjnhhKfdRJMh4+BXp5VjwTZsALJVpp2aN+e7vzw=="
       },
       "nanoFramework.TestFramework": {
         "type": "Direct",
-        "requested": "[4.0.0-preview.49, 4.0.0-preview.49]",
-        "resolved": "4.0.0-preview.49",
-        "contentHash": "9YYWJIV8o1LPHVmXiQWbfmIKIu/9Ioxw6qWGShpn7K9zX9hgEs7N3NmY+81Ku7rGssUSyKd3RCL2HvXFosRX2g=="
+        "requested": "[4.0.0-preview.52, 4.0.0-preview.52]",
+        "resolved": "4.0.0-preview.52",
+        "contentHash": "NnPJcRP41jr5pC8O5Zc29ozBAIm0PEXcj/vc/IjzWzsdNq1cpx8aRAoF3TW9cFEHdLu223tahoZyjFmALRSEoA=="
       }
     }
   }
diff --git a/Tests/NFUnitTestStringBuilder/NFUnitTestStringBuilder.nfproj b/Tests/NFUnitTestStringBuilder/NFUnitTestStringBuilder.nfproj
index 942d087..dc3527e 100644
--- a/Tests/NFUnitTestStringBuilder/NFUnitTestStringBuilder.nfproj
+++ b/Tests/NFUnitTestStringBuilder/NFUnitTestStringBuilder.nfproj
@@ -37,13 +37,13 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.43\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.49\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.TestFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.49\lib\nanoFramework.TestFramework.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.52\lib\nanoFramework.TestFramework.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.UnitTestLauncher, Version=0.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.49\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
+      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.52\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/Tests/NFUnitTestStringBuilder/packages.config b/Tests/NFUnitTestStringBuilder/packages.config
index b26279b..c556982 100644
--- a/Tests/NFUnitTestStringBuilder/packages.config
+++ b/Tests/NFUnitTestStringBuilder/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" targetFramework="netnano1.0" />
-  <package id="nanoFramework.TestFramework" version="4.0.0-preview.49" targetFramework="netnano1.0" developmentDependency="true" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" targetFramework="netnano1.0" />
+  <package id="nanoFramework.TestFramework" version="4.0.0-preview.52" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/Tests/NFUnitTestStringBuilder/packages.lock.json b/Tests/NFUnitTestStringBuilder/packages.lock.json
index 2dd3f26..21955ba 100644
--- a/Tests/NFUnitTestStringBuilder/packages.lock.json
+++ b/Tests/NFUnitTestStringBuilder/packages.lock.json
@@ -4,15 +4,15 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.43, 2.0.0-preview.43]",
-        "resolved": "2.0.0-preview.43",
-        "contentHash": "ijOdswxNI+zhN7MrRMjJPe7pAVhqARvpEOFKUKH6D18NUS3CCQ9+IoyVs3zJhmmBk53YmAErFAdCnAWLVxUu8Q=="
+        "requested": "[2.0.0-preview.49, 2.0.0-preview.49]",
+        "resolved": "2.0.0-preview.49",
+        "contentHash": "/8/fw1qqEql05aelTR9QQi4ZF2M+Mdwuemjf9rul8yaOpl6jjnhhKfdRJMh4+BXp5VjwTZsALJVpp2aN+e7vzw=="
       },
       "nanoFramework.TestFramework": {
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-        "requested": "[4.0.0-preview.49, 4.0.0-preview.49]",
-        "resolved": "4.0.0-preview.49",
-        "contentHash": "9YYWJIV8o1LPHVmXiQWbfmIKIu/9Ioxw6qWGShpn7K9zX9hgEs7N3NmY+81Ku7rGssUSyKd3RCL2HvXFosRX2g=="
+        "requested": "[4.0.0-preview.52, 4.0.0-preview.52]",
+        "resolved": "4.0.0-preview.52",
+        "contentHash": "NnPJcRP41jr5pC8O5Zc29ozBAIm0PEXcj/vc/IjzWzsdNq1cpx8aRAoF3TW9cFEHdLu223tahoZyjFmALRSEoA=="
       }
     }
   }
diff --git a/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj b/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
index c91cc8a..4e3373d 100644
--- a/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
+++ b/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
@@ -27,7 +27,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.43\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.49\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Benchmark, Version=1.0.113.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\packages\nanoFramework.Benchmark.1.0.113\lib\nanoFramework.Benchmark.dll</HintPath>
@@ -39,7 +39,7 @@
       <HintPath>..\packages\nanoFramework.Runtime.Native.2.0.0-preview.23\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.13\lib\netnano1.0\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Collections.2.0.0-preview.14\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.15\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 265a6dc..e10e119 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="1.0.113" targetFramework="netnano1.0" />
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" targetFramework="netnano1.0" />
   <package id="nanoFramework.Logging" version="2.0.0-preview.12" targetFramework="netnano1.0" />
   <package id="nanoFramework.Runtime.Native" version="2.0.0-preview.23" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Collections" version="2.0.0-preview.13" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Collections" version="2.0.0-preview.14" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Diagnostics.Stopwatch" version="2.0.0-preview.46" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.15" 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 9a8bfd8..881880f 100644
--- a/nanoFramework.System.Text.Benchmark/packages.lock.json
+++ b/nanoFramework.System.Text.Benchmark/packages.lock.json
@@ -10,9 +10,9 @@
       },
       "nanoFramework.CoreLibrary": {
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-        "requested": "[2.0.0-preview.43, 2.0.0-preview.43]",
-        "resolved": "2.0.0-preview.43",
-        "contentHash": "ijOdswxNI+zhN7MrRMjJPe7pAVhqARvpEOFKUKH6D18NUS3CCQ9+IoyVs3zJhmmBk53YmAErFAdCnAWLVxUu8Q=="
+        "requested": "[2.0.0-preview.49, 2.0.0-preview.49]",
+        "resolved": "2.0.0-preview.49",
+        "contentHash": "/8/fw1qqEql05aelTR9QQi4ZF2M+Mdwuemjf9rul8yaOpl6jjnhhKfdRJMh4+BXp5VjwTZsALJVpp2aN+e7vzw=="
       },
       "nanoFramework.Logging": {
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@@ -28,9 +28,9 @@
       },
       "nanoFramework.System.Collections": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.13, 2.0.0-preview.13]",
-        "resolved": "2.0.0-preview.13",
-        "contentHash": "LEfv51hBTigSimGDszg82kLLL94u4eHkRTiynim43VHvEidquK+JoxIJa+kAxilkkTl+fFA/cMUxUQG7djAxaA=="
+        "requested": "[2.0.0-preview.14, 2.0.0-preview.14]",
+        "resolved": "2.0.0-preview.14",
+        "contentHash": "bD/aprDzvUS7UGXXnP1NxY2fVw2686gNtiDXt1CV3IMA6YKu7cGXdPXfO8RYDkPNkHJ8omuHNuyUaq0OhJH82g=="
       },
       "nanoFramework.System.Diagnostics.Stopwatch": {
         "type": "Direct",
diff --git a/nanoFramework.System.Text.nuspec b/nanoFramework.System.Text.nuspec
index 2cd4c4c..abd1c7c 100644
--- a/nanoFramework.System.Text.nuspec
+++ b/nanoFramework.System.Text.nuspec
@@ -20,7 +20,7 @@ This package requires a target with System.Text v$nativeVersion$ (checksum $chec
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.System.Text</tags>
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
-        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" />
+        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" />
       </group>
     </dependencies>
   </metadata>
diff --git a/nanoFramework.System.Text/nanoFramework.System.Text.nfproj b/nanoFramework.System.Text/nanoFramework.System.Text.nfproj
index b518fdf..203ff60 100644
--- a/nanoFramework.System.Text/nanoFramework.System.Text.nfproj
+++ b/nanoFramework.System.Text/nanoFramework.System.Text.nfproj
@@ -63,7 +63,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.43\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.49\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
   </ItemGroup>
   <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
diff --git a/nanoFramework.System.Text/packages.config b/nanoFramework.System.Text/packages.config
index 5199020..d36e7c2 100644
--- a/nanoFramework.System.Text/packages.config
+++ b/nanoFramework.System.Text/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" 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.Text/packages.lock.json b/nanoFramework.System.Text/packages.lock.json
index bb57127..e95d3b5 100644
--- a/nanoFramework.System.Text/packages.lock.json
+++ b/nanoFramework.System.Text/packages.lock.json
@@ -4,9 +4,9 @@
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+        "requested": "[2.0.0-preview.49, 2.0.0-preview.49]",
+        "resolved": "2.0.0-preview.49",
+        "contentHash": "/8/fw1qqEql05aelTR9QQi4ZF2M+Mdwuemjf9rul8yaOpl6jjnhhKfdRJMh4+BXp5VjwTZsALJVpp2aN+e7vzw=="
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       "Nerdbank.GitVersioning": {
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