Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.

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C#

AddIn

I am using addin express tool for crate addin for ms outlook,word,excel
i wanna use sqllite database for that but ist is showing error

Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.

What I have tried:

<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
 </startup>
 <startup useLegacyV2RuntimeActivationPolicy="true" />

in app.config

public void connect()
       {
           SQLiteConnection sqlite_conn;
           SQLiteCommand sqlite_cmd=new SQLiteCommand();
           SQLiteDataReader sqlite_datareader;
           sqlite_conn = new SQLiteConnection("Data Source=clients.db;Version=3;New=False;Compress=True;");
           sqlite_conn.Open();
           sqlite_cmd.CommandText = "SELECT * FROM User";
           sqlite_datareader = sqlite_cmd.ExecuteReader();
           while (sqlite_datareader.Read()) // Read() returns true if there is still a result line to read
           {


               string myreader = sqlite_datareader.GetString(0);
               MessageBox.Show(myreader);
           }
           // We are ready, now lets cleanup and close our connection:
           sqlite_conn.Close();
       }