Save Game loading Deserialization from disk

Hi all,

I've been pulling my hairs out over the following for a couple of days now. I managed to make it work fine for saving data to disc but can't seem to get the reverse to work.

I want to load back from the disc a file and deserialize it into:

 public KeyValuePairLists<bool> boolKeyValuePairLists = new KeyValuePairLists<bool> ();

My loading method is:

     public void LoadFromDisk(){
             //the errors send back to this line but I can't see any wrong arguments ...
         Serializer.Deserialize (this.name + "Bool.dat", boolKeyValuePairLists);
     }

Followed by the Serializer class which contains:

     public class Serializer{    
         //generic deserialization from disk method
         public static void Deserialize<T>(string filename, ref KeyValuePairLists<T> data)
         {
             if (File.Exists (Application.dataPath + "/GameSave/" + filename)) {
                 BinaryFormatter bf = new BinaryFormatter ();
                 FileStream file = File.Open(Application.dataPath + "/GameSave/" +  filename, FileMode.Open);
                 data = (KeyValuePairLists<T>) bf.Deserialize (file);
                 file.Close();
             }
         }
 
         // deserialization overloads
         private void Deserialize(string filename, ref KeyValuePairLists<bool> data)
         {
             Deserialize (filename, ref data);
         }    
     }
 

So far I've managed to reduce all the errors down to:

 Assets/Scripts/ScriptableObjects/DataPersistence/SaveData.cs(182,14): error CS1502: The best overloaded method match for `SaveData.Serializer.Deserialize<bool>(string, ref SaveData.KeyValuePairLists<bool>)' has some invalid arguments

 Assets/Scripts/ScriptableObjects/DataPersistence/SaveData.cs(182,51): error CS1620: Argument `#2' is missing `ref' modifier