var conn = new SqliteConnection ("Data Source=hello.db");
conn.Open();

SqliteCommand cmd = conn.CreateCommand();
string sql = @"
    insert into sampletable
    values
    (@col1, @col2 )
";
cmd.CommandText = sql;
cmd.Parameters.AddWithValue("@col1", "egy");
cmd.Parameters.AddWithValue("@col2", 33);
cmd.Prepare();
cmd.ExecuteNonQuery();