diff --git a/System.IO.FileSystem.UnitTests/System.IO.FileSystem.UnitTests.nfproj b/System.IO.FileSystem.UnitTests/System.IO.FileSystem.UnitTests.nfproj
index e96f044..dcee2d8 100644
--- a/System.IO.FileSystem.UnitTests/System.IO.FileSystem.UnitTests.nfproj
+++ b/System.IO.FileSystem.UnitTests/System.IO.FileSystem.UnitTests.nfproj
@@ -49,7 +49,7 @@
   </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.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/System.IO.FileSystem.UnitTests/packages.config b/System.IO.FileSystem.UnitTests/packages.config
index aaac0fa..705553a 100644
--- a/System.IO.FileSystem.UnitTests/packages.config
+++ b/System.IO.FileSystem.UnitTests/packages.config
@@ -1,6 +1,6 @@
 <?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="nanoFramework.System.IO.Streams" version="2.0.0-preview.15" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.15" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.52" targetFramework="netnano1.0" developmentDependency="true" />
diff --git a/System.IO.FileSystem.UnitTests/packages.lock.json b/System.IO.FileSystem.UnitTests/packages.lock.json
index 02029c5..ae27c54 100644
--- a/System.IO.FileSystem.UnitTests/packages.lock.json
+++ b/System.IO.FileSystem.UnitTests/packages.lock.json
@@ -4,9 +4,9 @@
     ".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.System.IO.Streams": {
         "type": "Direct",
diff --git a/System.IO.FileSystem/System.IO.FileSystem.nfproj b/System.IO.FileSystem/System.IO.FileSystem.nfproj
index 8ead468..f0b966a 100644
--- a/System.IO.FileSystem/System.IO.FileSystem.nfproj
+++ b/System.IO.FileSystem/System.IO.FileSystem.nfproj
@@ -77,10 +77,10 @@
   </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.Runtime.Events, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.11\lib\netnano1.0\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.12\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.15\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>
diff --git a/System.IO.FileSystem/packages.config b/System.IO.FileSystem/packages.config
index 86d0021..970cf37 100644
--- a/System.IO.FileSystem/packages.config
+++ b/System.IO.FileSystem/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" targetFramework="netnano1.0" />
-  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.11" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.12" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.15" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.15" targetFramework="netnano1.0" />
   <package id="Nerdbank.GitVersioning" version="3.9.50" developmentDependency="true" targetFramework="netnano1.0" />
diff --git a/System.IO.FileSystem/packages.lock.json b/System.IO.FileSystem/packages.lock.json
index ce212f2..782a7fd 100644
--- a/System.IO.FileSystem/packages.lock.json
+++ b/System.IO.FileSystem/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.Runtime.Events": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.11, 2.0.0-preview.11]",
-        "resolved": "2.0.0-preview.11",
-        "contentHash": "kv+GggxqjVYdv58LRJCF0r0ElZLouYuCKNea++oySdvjyHndK6/3Yb74DWKB7AeW61zR9AP0hJIuBI8GzX6qEQ=="
+        "requested": "[2.0.0-preview.12, 2.0.0-preview.12]",
+        "resolved": "2.0.0-preview.12",
+        "contentHash": "49clC9iMibQ7Sm73xShGsKqjee54JZ7QGuxys1wPkG2tvHIziGtb51U+RxdfdVGz/UtSv9q5ebqo0IYlk7BFxw=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
diff --git a/nanoFramework.System.IO.FileSystem.nuspec b/nanoFramework.System.IO.FileSystem.nuspec
index 6d726c0..c45ba39 100644
--- a/nanoFramework.System.IO.FileSystem.nuspec
+++ b/nanoFramework.System.IO.FileSystem.nuspec
@@ -20,8 +20,8 @@ This package requires a target with System.IO.FileSystem v$nativeVersion$ (check
     <tags>nanoFramework C# csharp netmf netnf System.IO.FileSystem</tags>
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
-        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" />
-        <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.11" />
+        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" />
+        <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.12" />
         <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.15" />
         <dependency id="nanoFramework.System.Text" version="2.0.0-preview.15" />
       </group>