public void add(byte[] key, ColumnParent column_parent, CounterColumn column, ConsistencyLevel consistency_level)
{
#if !SILVERLIGHT
send_add(key, column_parent, column, consistency_level);
recv_add();
#else
var asyncResult = Begin_add(null, null, key, column_parent, column, consistency_level);
End_add(asyncResult);
#endif
}
#if SILVERLIGHT