SQLite Table That Auto Increments Primary Key

Well the main problem is that I get a error when trying to insert a Data Entry.

(Not auto incrementing the primary key)

Table Creation:

SQLiteConnection _sqliteCon = new SQLiteConnection(_connectStr);
_sqliteCon.Open();

string query5 = "CREATE TABLE Merkmal(MerkmalID INT PRIMARY KEY NOT NULL, ";
        query5 += "MerkmalName_FR TEXT);";
        SQLiteCommand command5 = new SQLiteCommand(query5, _sqliteCon);
        command5.ExecuteNonQuery();
        _sqliteCon.Close();

This appears to work fine.

Now for the Insert: (I Assume this is where my mistake is occuring )

SQLiteConnection _sqliteCon = new SQLiteConnection(_connectStr);
_sqliteCon.Open();
SQLiteCommand insertSQL = new SQLiteCommand("INSERT INTO Merkmal(MerkmalID,MerkmalName_FR) VALUES (?,?)",_sqliteCon);
insertSQL.Parameters.Add(new SQLiteParameter("param1",null));
insertSQL.Parameters.Add(new SQLiteParameter("param2",SomeString));
insertSQL.ExecuteNonQuery();
_sqliteCon.Close();

Some things worth noting:

1. 
   

   I have attempted not putting a value at all. (With hardcoded values)

   
   


2. 
   

   I get the not null exception error when trying to insert.

   
   

What is the correct way to create or insert into a table so that it auto increments the Primary Key

Thanks in Advance guys.