diff --git a/samples/README.md b/samples/README.md
new file mode 100644
index 0000000..b127045
--- /dev/null
+++ b/samples/README.md
@@ -0,0 +1,5 @@
+## HttpClient.Cache - Samples
+
+Simple console app with in-memory example for cache. 
+
+`ConsoleApp` works only with caching data from external source.
diff --git a/src/HttpClient.Cache/InMemory/CacheEntry.cs b/src/HttpClient.Cache/InMemory/CacheEntry.cs
index 2678d45..36b1cb3 100644
--- a/src/HttpClient.Cache/InMemory/CacheEntry.cs
+++ b/src/HttpClient.Cache/InMemory/CacheEntry.cs
@@ -34,7 +34,7 @@ internal CacheEntry(
     }
 
     public object Key { get; }
-    public object Value { get; set; }
+    public object Value { get; set; } = null!;
     
     public CacheEntryPriority Priority { get; set; } = CacheEntryPriority.Normal;
 
@@ -222,7 +222,7 @@ internal void InvokeEvictionCallbacks()
             return;
         }
 
-        Task.Factory.StartNew(state => InvokeCallbacks((CacheEntry)state), this, CancellationToken.None,
+        Task.Factory.StartNew(state => InvokeCallbacks((CacheEntry)state!), this, CancellationToken.None,
             TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
     }
 
diff --git a/src/HttpClient.Cache/InMemory/MemoryCache.cs b/src/HttpClient.Cache/InMemory/MemoryCache.cs
index 137b9f0..aded4fc 100644
--- a/src/HttpClient.Cache/InMemory/MemoryCache.cs
+++ b/src/HttpClient.Cache/InMemory/MemoryCache.cs
@@ -233,7 +233,7 @@ private void StartScanForExpiredItems()
 
         _lastExpirationScan = currentTime;
 
-        Task.Factory.StartNew(state => ScanForExpiredItems((MemoryCache)state), this, CancellationToken.None,
+        Task.Factory.StartNew(state => ScanForExpiredItems((MemoryCache)state!), this, CancellationToken.None,
             TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
     }
 
diff --git a/src/README.md b/src/README.md
new file mode 100644
index 0000000..fd2b2ef
--- /dev/null
+++ b/src/README.md
@@ -0,0 +1,5 @@
+## HttpClient.Cache - Code
+
+The Source code. This folder and project will be packaged
+
+
diff --git a/tests/README.md b/tests/README.md
new file mode 100644
index 0000000..084fb77
--- /dev/null
+++ b/tests/README.md
@@ -0,0 +1,7 @@
+## HttpClient.Cache - Tests
+
+Unit tests for cache package. 
+
+Test framework - Xunit.
+
+