Sets the value of the corresponding field in the list item to the properties of the specified Term object in the default language of the TermStore object.
public void SetFieldValue(
The SPListItem object whose field is to be updated.
The Term object whose properties are used to update the field value.
One or more arguments of this method are a null reference (Nothing in Visual Basic).
A Term has a maximum of one default Label for every language in the TermStore object. This method uses the same default Label (in the default language of the TermStore object )that the Term object uses by default