diff --git a/Net.DistributedFileStoreCache/Net.DistributedFileStoreCache.csproj b/Net.DistributedFileStoreCache/Net.DistributedFileStoreCache.csproj
index e34f2f5..b3d982b 100644
--- a/Net.DistributedFileStoreCache/Net.DistributedFileStoreCache.csproj
+++ b/Net.DistributedFileStoreCache/Net.DistributedFileStoreCache.csproj
@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>net6.0</TargetFramework>
+		<TargetFramework>netstandard2.1</TargetFramework>
+		<LangVersion>latest</LangVersion>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
 		<GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -18,14 +19,12 @@
 
 	<PropertyGroup>
 		<PackageId>Net.DistributedFileStoreCache</PackageId>
-		<PackageVersion>1.2.0-preview001</PackageVersion>
+		<PackageVersion>2.0.0</PackageVersion>
 		<Authors>Jon P Smith</Authors>
 		<Description>A fast .NET distributed cache using a json file as the shared resource</Description>
 		<PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
 		<PackageReleaseNotes>
-- New Feature: SetMany / SetManyAsync now allows you to many entries in one go. This can add many entries as quickly as a single Set call.
-- New Feature: SetManyClass / SetManyClassAsync now allows you to many entries in one go. This can add many entries as quickly as a single SetClass call.
-- New Feature: ClearAll now has an option to add a list of key/value pairs into the json cache file after the cache is cleared
+			Changed target framework to netstandard2.1 to work with any version of .NET
 		</PackageReleaseNotes>
 		<Copyright>Copyright (c) 2022 Jon P Smith. Licenced under MIT licence</Copyright>
 		<PackageTags>Distributed cache</PackageTags>
diff --git a/Net.DistributedFileStoreCache/SupportCode/CacheFileHandler.cs b/Net.DistributedFileStoreCache/SupportCode/CacheFileHandler.cs
index 3ab837a..548148f 100644
--- a/Net.DistributedFileStoreCache/SupportCode/CacheFileHandler.cs
+++ b/Net.DistributedFileStoreCache/SupportCode/CacheFileHandler.cs
@@ -236,6 +236,11 @@ private async ValueTask UpdateLocalCacheFromCacheFileAsync(CancellationToken tok
             StaticCachePart.UpdateLocalCache(GetJsonFromByteBuffer(numBytesRead, ref readBuffer));
         }
     }
+
+    /// <summary>
+    /// delegate to use in methods
+    /// </summary>
+    /// <param name="updateCurrentJson"></param>
     public delegate void UpdateJsonDelegate(ref CacheJsonContent updateCurrentJson);
 
     private async ValueTask ReadAndChangeCacheJsonFile(UpdateJsonDelegate? updateCurrentJson, bool useAsync, 
diff --git a/Net.DistributedFileStoreCache/SupportCode/ValueTaskSyncCheckers.cs b/Net.DistributedFileStoreCache/SupportCode/ValueTaskSyncCheckers.cs
index 7468626..8ed4587 100644
--- a/Net.DistributedFileStoreCache/SupportCode/ValueTaskSyncCheckers.cs
+++ b/Net.DistributedFileStoreCache/SupportCode/ValueTaskSyncCheckers.cs
@@ -38,29 +38,29 @@ public static TResult CheckSyncValueTaskWorkedAndReturnResult<TResult>(this Valu
         return valueTask.GetAwaiter().GetResult();
     }
 
-    public static TResult CheckSyncValueTaskWorkedDynamicAndReturnResult<TResult>(dynamic dynamicValueType)
-    {
-        try
-        {
-            var runner = Activator.CreateInstance(typeof(GenericValueTypeChecker<TResult>),
-                dynamicValueType);
-            return ((GenericValueTypeChecker<TResult>)runner).Result;
-        }
-        catch (Exception e)
-        {
-            ExceptionDispatchInfo.Capture(e?.InnerException ?? e).Throw();
-        }
+    //public static TResult CheckSyncValueTaskWorkedDynamicAndReturnResult<TResult>(dynamic dynamicValueType)
+    //{
+    //    try
+    //    {
+    //        var runner = Activator.CreateInstance(typeof(GenericValueTypeChecker<TResult>),
+    //            dynamicValueType);
+    //        return ((GenericValueTypeChecker<TResult>)runner).Result;
+    //    }
+    //    catch (Exception e)
+    //    {
+    //        ExceptionDispatchInfo.Capture(e?.InnerException ?? e).Throw();
+    //    }
 
-        return default;
-    }
+    //    return default;
+    //}
 
-    private class GenericValueTypeChecker<TResult>
-    {
-        public GenericValueTypeChecker(dynamic valueTask)
-        {
-            Result = CheckSyncValueTaskWorkedAndReturnResult(((ValueTask<TResult>)valueTask));
-        }
+    //private class GenericValueTypeChecker<TResult>
+    //{
+    //    public GenericValueTypeChecker(dynamic valueTask)
+    //    {
+    //        Result = CheckSyncValueTaskWorkedAndReturnResult(((ValueTask<TResult>)valueTask));
+    //    }
 
-        public TResult Result { get; }
-    }
+    //    public TResult Result { get; }
+    //}
 }
\ No newline at end of file
diff --git a/ReleaseNotes.md b/ReleaseNotes.md
index 76bc9ad..7792924 100644
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.md
@@ -1,5 +1,9 @@
 # Release Notes
 
+## 2.0.0
+
+- Changed target framework to netstandard2.1 to work with any version of .NET
+
 ## 1.1.0
 
 - New Feature: SetMany / SetManyAsync now allows you to many entries in one go. This can add many entries as quickly as a single Set call.
diff --git a/Test/TestData/FileStoreCacheFile.TestCacheServiceParallel.json b/Test/TestData/FileStoreCacheFile.TestCacheServiceParallel.json
index 69ba967..c430871 100644
--- a/Test/TestData/FileStoreCacheFile.TestCacheServiceParallel.json
+++ b/Test/TestData/FileStoreCacheFile.TestCacheServiceParallel.json
@@ -1 +1 @@
-{"Cache":{"Key4":"Diff = 1.112 ms","Key3":"Diff = 1.139 ms","Key2":"Diff = 1.192 ms","Key1":"Diff = 19.347 ms","Key5":"Diff = 1.166 ms"},"TimeOuts":{}}
\ No newline at end of file
+{"Cache":{"Key4":"Diff = 1.074 ms","Key2":"Diff = 1.160 ms","Key1":"Diff = 13.030 ms","Key3":"Diff = 1.098 ms","Key5":"Diff = 1.155 ms"},"TimeOuts":{}}
\ No newline at end of file
diff --git a/Test/TestData/FileStoreCacheFile.TestDistributedFileStoreCacheClassAsync.json b/Test/TestData/FileStoreCacheFile.TestDistributedFileStoreCacheClassAsync.json
new file mode 100644
index 0000000..26269f5
--- /dev/null
+++ b/Test/TestData/FileStoreCacheFile.TestDistributedFileStoreCacheClassAsync.json
@@ -0,0 +1 @@
+{"Cache":{"test":"{\"MyInt\":1,\"MyString\":\"Hello\"}"},"TimeOuts":{}}
\ No newline at end of file
diff --git a/Test/TestData/FileStoreCacheFile.TestDistributedFileStoreCacheString_Async.json b/Test/TestData/FileStoreCacheFile.TestDistributedFileStoreCacheString_Async.json
index 9504416..ef091c8 100644
--- a/Test/TestData/FileStoreCacheFile.TestDistributedFileStoreCacheString_Async.json
+++ b/Test/TestData/FileStoreCacheFile.TestDistributedFileStoreCacheString_Async.json
@@ -1 +1 @@
-{"Cache":{"test-timeoutExpired":"time1"},"TimeOuts":{"test-timeoutExpired":638012624251983534}}
\ No newline at end of file
+{"Cache":{"test-timeoutExpired":"time1"},"TimeOuts":{"test-timeoutExpired":638041088939418683}}
\ No newline at end of file
diff --git a/Test/TestHelpers/ParallelExtensions.cs b/Test/TestHelpers/ParallelExtensions.cs
index 1ba39fa..00c952e 100644
--- a/Test/TestHelpers/ParallelExtensions.cs
+++ b/Test/TestHelpers/ParallelExtensions.cs
@@ -19,7 +19,8 @@ public static async IAsyncEnumerable<int> NumTimesAsyncEnumerable(this int numTi
     }
 
 
-    public static async Task AsyncParallelForEach<T>(this IAsyncEnumerable<T> source, Func<T, Task> body, int maxDegreeOfParallelism = DataflowBlockOptions.Unbounded, TaskScheduler scheduler = null)
+    public static async Task AsyncParallelForEach<T>(this IAsyncEnumerable<T> source, Func<T, Task> body, 
+        int maxDegreeOfParallelism = DataflowBlockOptions.Unbounded, TaskScheduler scheduler = null)
     {
         var options = new ExecutionDataflowBlockOptions
         {