diff --git a/System.IO.FileSystem.UnitTests/System.IO.FileSystem.UnitTests.nfproj b/System.IO.FileSystem.UnitTests/System.IO.FileSystem.UnitTests.nfproj
index d736ea8..ed284f4 100644
--- a/System.IO.FileSystem.UnitTests/System.IO.FileSystem.UnitTests.nfproj
+++ b/System.IO.FileSystem.UnitTests/System.IO.FileSystem.UnitTests.nfproj
@@ -48,11 +48,11 @@
     <ProjectReference Include="..\System.IO.FileSystem\System.IO.FileSystem.nfproj" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.29\lib\netnano1.0\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.30\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
-    <Reference Include="nanoFramework.System.Text">
-      <HintPath>..\packages\nanoFramework.System.Text.2.0.0-preview.1\lib\nanoFramework.System.Text.dll</HintPath>
+    <Reference Include="nanoFramework.System.Text, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.System.Text.2.0.0-preview.3\lib\nanoFramework.System.Text.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.TestFramework">
       <HintPath>..\packages\nanoFramework.TestFramework.4.0.0-preview.45\lib\nanoFramework.TestFramework.dll</HintPath>
@@ -60,12 +60,12 @@
     <Reference Include="nanoFramework.UnitTestLauncher">
       <HintPath>..\packages\nanoFramework.TestFramework.4.0.0-preview.45\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
     </Reference>
-    <Reference Include="System.IO.Streams">
-      <HintPath>..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.1\lib\System.IO.Streams.dll</HintPath>
+    <Reference Include="System.IO.Streams, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.6\lib\System.IO.Streams.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
   <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
-</Project>
+</Project>
\ No newline at end of file
diff --git a/System.IO.FileSystem.UnitTests/packages.config b/System.IO.FileSystem.UnitTests/packages.config
index 1ea5a38..0764516 100644
--- a/System.IO.FileSystem.UnitTests/packages.config
+++ b/System.IO.FileSystem.UnitTests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.29" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.1" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Text" version="2.0.0-preview.1" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.30" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.6" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Text" version="2.0.0-preview.3" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.45" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/System.IO.FileSystem.UnitTests/packages.lock.json b/System.IO.FileSystem.UnitTests/packages.lock.json
index e0880e1..1abbaf0 100644
--- a/System.IO.FileSystem.UnitTests/packages.lock.json
+++ b/System.IO.FileSystem.UnitTests/packages.lock.json
@@ -4,21 +4,21 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.29, 2.0.0-preview.29]",
-        "resolved": "2.0.0-preview.29",
-        "contentHash": "7NDp9Sda9FTFBDN//X34r23rJBHUkCvyGvrFh9s5B8H2nMoet4J0OlEOiZRUsEPBXlsNpZFVp+Cd6OSjnLSg5A=="
+        "requested": "[2.0.0-preview.30, 2.0.0-preview.30]",
+        "resolved": "2.0.0-preview.30",
+        "contentHash": "Fz+5L0yOpe0ZoBpVRqH8G8Dr18OoXVE6sKertR/bPuWyOJiO42enlarudfv91/gpJXFkQGNCCdXpHWpoc77jyg=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.1, 2.0.0-preview.1]",
-        "resolved": "2.0.0-preview.1",
-        "contentHash": "JCLDrlrh5hbmL6nlYIY+eWGvyJwN7NgU6lHJfxQ8IhDLw/B08k+iAo/KLXLB2n1bAb4b0zhGeLlJ0P1xZUyDeg=="
+        "requested": "[2.0.0-preview.6, 2.0.0-preview.6]",
+        "resolved": "2.0.0-preview.6",
+        "contentHash": "oss0VzD5zmc2P+sVT+l+VgWn9aL6WJca1OVaneCryd6ZJjedPLmIeFxJxhFC9TYXHAyVk/AFbxfNQSh2luKVDA=="
       },
       "nanoFramework.System.Text": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.1, 2.0.0-preview.1]",
-        "resolved": "2.0.0-preview.1",
-        "contentHash": "+FZMSc0QPp6GbU63WXCmryKtd/zEkmH51daIV3UIV3t9CUHSg8sK7rkASVrlQ7kGYbgQl02IDbIB/r1hIK1MLw=="
+        "requested": "[2.0.0-preview.3, 2.0.0-preview.3]",
+        "resolved": "2.0.0-preview.3",
+        "contentHash": "9xP5PBUERm2c5cmY4YPHsnmB/4tk6onfHQBd8zkY2kRKq5oftTpN/P5BSP+gUUy4UfxO/Z4vSKmeCDrDJGDMzQ=="
       },
       "nanoFramework.TestFramework": {
         "type": "Direct",
diff --git a/System.IO.FileSystem/FileStream.cs b/System.IO.FileSystem/FileStream.cs
index 68dc650..2f67250 100644
--- a/System.IO.FileSystem/FileStream.cs
+++ b/System.IO.FileSystem/FileStream.cs
@@ -545,6 +545,16 @@ public override void Write(byte[] buffer, int offset, int count)
             }
         }
 
+        /// <summary>
+        /// Writes a sequence of bytes from a read-only span to the current file stream and advances the current position within this file stream by the number of bytes written.
+        /// </summary>
+        /// <param name="buffer">A region of memory. This method copies the contents of this region to the current file stream.</param>
+        /// <exception cref="IOException">The underlying pipe is closed or disconnected.</exception>
+        public override void Write(ReadOnlySpan<byte> buffer)
+        {
+            Write(buffer.ToArray(), 0, buffer.Length);
+        }
+
         /// <summary>
         /// Writes a byte to the current position in the file stream.
         /// </summary>
diff --git a/System.IO.FileSystem/Properties/AssemblyInfo.cs b/System.IO.FileSystem/Properties/AssemblyInfo.cs
index d0b7d58..15d28b9 100644
--- a/System.IO.FileSystem/Properties/AssemblyInfo.cs
+++ b/System.IO.FileSystem/Properties/AssemblyInfo.cs
@@ -17,7 +17,7 @@
 
 ////////////////////////////////////////////////////////////////
 // update this whenever the native assembly signature changes //
-[assembly: AssemblyNativeVersion("100.2.0.0")]
+[assembly: AssemblyNativeVersion("100.2.0.1")]
 ////////////////////////////////////////////////////////////////
 
 [assembly: InternalsVisibleTo("NFUnitTest, PublicKey=00240000048000009400000006020000002400005253413100040000010001001120aa3e809b3da4f65e1b1f65c0a3a1bf6335c39860ca41acb3c48de278c6b63c5df38239ec1f2e32d58cb897c8c174a5f8e78a9c0b6087d3aef373d7d0f3d9be67700fc2a5a38de1fb71b5b6f6046d841ff35abee2e0b0840a6291a312be184eb311baff5fef0ff6895b9a5f2253aed32fb06b819134f6bb9d531488a87ea2")]
diff --git a/System.IO.FileSystem/System.IO.FileSystem.nfproj b/System.IO.FileSystem/System.IO.FileSystem.nfproj
index 3a0956e..a1b6855 100644
--- a/System.IO.FileSystem/System.IO.FileSystem.nfproj
+++ b/System.IO.FileSystem/System.IO.FileSystem.nfproj
@@ -76,17 +76,17 @@
     <Content Include="packages.lock.json" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.29\lib\netnano1.0\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.30\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
-    <Reference Include="nanoFramework.Runtime.Events">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.2\lib\nanoFramework.Runtime.Events.dll</HintPath>
+    <Reference Include="nanoFramework.Runtime.Events, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.5\lib\nanoFramework.Runtime.Events.dll</HintPath>
     </Reference>
-    <Reference Include="nanoFramework.System.Text">
-      <HintPath>..\packages\nanoFramework.System.Text.2.0.0-preview.1\lib\nanoFramework.System.Text.dll</HintPath>
+    <Reference Include="nanoFramework.System.Text, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.System.Text.2.0.0-preview.3\lib\nanoFramework.System.Text.dll</HintPath>
     </Reference>
-    <Reference Include="System.IO.Streams">
-      <HintPath>..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.1\lib\System.IO.Streams.dll</HintPath>
+    <Reference Include="System.IO.Streams, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.6\lib\System.IO.Streams.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ProjectExtensions>
diff --git a/System.IO.FileSystem/packages.config b/System.IO.FileSystem/packages.config
index 6be85cf..b0ff755 100644
--- a/System.IO.FileSystem/packages.config
+++ b/System.IO.FileSystem/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.29" targetFramework="netnano1.0" />
-  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.2" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.1" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Text" version="2.0.0-preview.1" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.30" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.5" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.6" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Text" version="2.0.0-preview.3" 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/System.IO.FileSystem/packages.lock.json b/System.IO.FileSystem/packages.lock.json
index 4412f28..2dccd1e 100644
--- a/System.IO.FileSystem/packages.lock.json
+++ b/System.IO.FileSystem/packages.lock.json
@@ -4,27 +4,27 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.29, 2.0.0-preview.29]",
-        "resolved": "2.0.0-preview.29",
-        "contentHash": "7NDp9Sda9FTFBDN//X34r23rJBHUkCvyGvrFh9s5B8H2nMoet4J0OlEOiZRUsEPBXlsNpZFVp+Cd6OSjnLSg5A=="
+        "requested": "[2.0.0-preview.30, 2.0.0-preview.30]",
+        "resolved": "2.0.0-preview.30",
+        "contentHash": "Fz+5L0yOpe0ZoBpVRqH8G8Dr18OoXVE6sKertR/bPuWyOJiO42enlarudfv91/gpJXFkQGNCCdXpHWpoc77jyg=="
       },
       "nanoFramework.Runtime.Events": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.2, 2.0.0-preview.2]",
-        "resolved": "2.0.0-preview.2",
-        "contentHash": "2R3UXwVl5UqO9vMtcfUbffQd2bbMTwqHqYgzRKT5Cwh87ZhkCcN2vWDBnFEBdXb92PNocEz/SpeocqqkeYulIw=="
+        "requested": "[2.0.0-preview.5, 2.0.0-preview.5]",
+        "resolved": "2.0.0-preview.5",
+        "contentHash": "NmmnwN/vEYEC94nL9nNqh0C5/BrLF60DzIzRsnGNACkpSJ+JSQYPsz3wgti1r7OhvgEprTjPeO3Fc7XGw/2Y8w=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.1, 2.0.0-preview.1]",
-        "resolved": "2.0.0-preview.1",
-        "contentHash": "JCLDrlrh5hbmL6nlYIY+eWGvyJwN7NgU6lHJfxQ8IhDLw/B08k+iAo/KLXLB2n1bAb4b0zhGeLlJ0P1xZUyDeg=="
+        "requested": "[2.0.0-preview.6, 2.0.0-preview.6]",
+        "resolved": "2.0.0-preview.6",
+        "contentHash": "oss0VzD5zmc2P+sVT+l+VgWn9aL6WJca1OVaneCryd6ZJjedPLmIeFxJxhFC9TYXHAyVk/AFbxfNQSh2luKVDA=="
       },
       "nanoFramework.System.Text": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.1, 2.0.0-preview.1]",
-        "resolved": "2.0.0-preview.1",
-        "contentHash": "+FZMSc0QPp6GbU63WXCmryKtd/zEkmH51daIV3UIV3t9CUHSg8sK7rkASVrlQ7kGYbgQl02IDbIB/r1hIK1MLw=="
+        "requested": "[2.0.0-preview.3, 2.0.0-preview.3]",
+        "resolved": "2.0.0-preview.3",
+        "contentHash": "9xP5PBUERm2c5cmY4YPHsnmB/4tk6onfHQBd8zkY2kRKq5oftTpN/P5BSP+gUUy4UfxO/Z4vSKmeCDrDJGDMzQ=="
       },
       "Nerdbank.GitVersioning": {
         "type": "Direct",
diff --git a/nanoFramework.System.IO.FileSystem.nuspec b/nanoFramework.System.IO.FileSystem.nuspec
index 88fceec..1007257 100644
--- a/nanoFramework.System.IO.FileSystem.nuspec
+++ b/nanoFramework.System.IO.FileSystem.nuspec
@@ -19,10 +19,10 @@
 This package requires a target with System.IO.FileSystem v$nativeVersion$ (checksum $checksum$).</description>
     <tags>nanoFramework C# csharp netmf netnf System.IO.FileSystem</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.29" />
-      <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.2" />
-      <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.1" />
-      <dependency id="nanoFramework.System.Text" version="2.0.0-preview.1" />
+      <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.30" />
+      <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.5" />
+      <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.6" />
+      <dependency id="nanoFramework.System.Text" version="2.0.0-preview.3" />
     </dependencies>
   </metadata>
   <files>