c# - remove each listbox1 items after running the query? -

i have items inside listbox1 , want use each items run query, once query runned, want delete item inside listbox , use next item run query. example if item1 used delete item1 , use next item inside listbox run query.do items till no items left inside listbox1.

foreach (string myitems in listbox1.items) {     using (oraclecommand crtcommand = new oraclecommand(select regexp_replace(dbms_metadata.get_ddl('" + myitems + "'), conn1))     {         string expectedresult = "y";         string dataresult = crtcommand.executescalar().tostring();         if (expectedresult == dataresult)         {             //do , remove item has been used run query.                                            }         else         {          }      } } 

you cannot directly in foreach loop. give exception 'collection modified; enumeration operation may not execute' if try inside foreach loop. rather after executing entire query can delete them all.

listbox1.items.clear(); 

incase want keep track of items have been executed can create

hashset<int> ids = new hashset<int>(); ids.add(youridtoadd);  

and add executed ids in that.