wpf - Binding on a row of a list -

i'm searching way making binding of datagrid colomn on row of list looking in pseudo code:

                datagridtextcolumn colbuild = new datagridtextcolumn                 {                     header = "custom column name",                     binding = new binding("mylist.elementat(0)")                 }; 

i known can looks strange i'm looking adding variable number of custom columns on datagrid in addition fixed ones. , don't know how data filled in columns. can me?