ItemAdding list field

Question

I am trying to update list field using ItemAdding,

public override void ItemAdding(SPItemEventProperties properties)
    {


        SPListItem curListItem = properties.ListItem;
        curListItem.Web.AllowUnsafeUpdates = true; // This property should be set to true for the update to go through
        curListItem["Age"] = "";
        curListItem.Update(); // This line should update the ListItem but it doesnt

    }

UPDATE

  public override void ItemAdding(SPItemEventProperties properties)
    {

        string empty = "";
        properties.AfterProperties["Age"] = empty;
        base.ItemAdding(properties);

    }

Answer 1

Use properties.AfterProperties["Age"] = "Your Value";

See Set custom field value in ItemAdding event for more information.