diff --git a/Serializer/Serialize.cs b/Serializer/Serialize.cs
index 3c414bc0..4fdde98b 100644
--- a/Serializer/Serialize.cs
+++ b/Serializer/Serialize.cs
@@ -15,7 +15,6 @@
 using System.Linq;
 using System.Xml;
 using System.Xml.Serialization;
-using ExtendedSystemObjects;
 using FileHandler;
 
 namespace Serializer
@@ -138,7 +137,7 @@ public static void SaveDctObjectToXml<TKey, TValue>(Dictionary<TKey, TValue> dct
             FileHandleCreate.CreateFolder(folder);
 
             //check if file is empty, if empty return
-            if (dct.IsNullOrEmpty())
+            if (dct == null || dct.Count == 0)
             {
                 throw new ArgumentException(SerialResources.ErrorSerializerEmpty);
             }
@@ -183,7 +182,7 @@ private static string Handle<T>(this T obj)
         private static void SerializeDictionary(Dictionary<string, string> dct, string path)
         {
             //check if file is empty, if empty return
-            if (dct.IsNullOrEmpty())
+            if (dct == null || dct.Count == 0)
             {
                 throw new ArgumentException(SerialResources.ErrorSerializerEmpty);
             }
diff --git a/Serializer/Serializer.csproj b/Serializer/Serializer.csproj
index 548e4564..cb0f6a00 100644
--- a/Serializer/Serializer.csproj
+++ b/Serializer/Serializer.csproj
@@ -9,7 +9,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\ExtendedSystemObjects\ExtendedSystemObjects.csproj" />
     <ProjectReference Include="..\FileHandler\FileHandler.csproj" />
   </ItemGroup>