if (DotNetNuke.Entities.Profile.ProfileController.GetPropertyDefinitionByName(this.PortalId, "QQ") == null)
{
DotNetNuke.Entities.Profile.ProfileController.AddPropertyDefinition(
new DotNetNuke.Entities.Profile.ProfilePropertyDefinition(this.PortalId)
{
PropertyName = "QQ",
DataType = new DotNetNuke.Common.Lists.ListController().GetListEntryInfo("DataType","Text").EntryID,
Length = 10,
PropertyCategory = "Contact" , Visible=true ,DefaultVisibility=DotNetNuke.Entities.Users.UserVisibilityMode.AllUsers
});
}