Remove #;Id from lookup field in object model

 In Server side object model there will be  requirements  to display Multivalued lookupfield values,by  using direct the column value it will show you like 1;#value1;2;#value2 .To remove the special characters and the ID from the value use following :

SPFieldLookup filed1 = (SPFieldLookup)oSourceListItem.Fields["Column Name"];
 string value1 = filed1.GetFieldValueAsText(oSourceListItem["Column Name"]);
 itemToAdd["Column Name"] = value1;