I'm assuming by 'if the column contains fullstop' you are referring to the column name.
IMHO, the "workaround" is not to use '.' within a column name.
Depending on what you are doing (databinding, loading from a database etc) the '.' has a special meaning qualifing a column.
You run into all kinds of weird escaping problems when you want to maintain column names containing a '.' in a database and
through different database access technologies.
You can always set the column header to a different string than the column name.
If that's not covering your problem, you have to give us more Information on what you are doing.