private void AddNewEntity()
{
Utilities.DataIO data = new Profiles.Edit.Utilities.DataIO();
string newentity = txtNewEntity.Text.Trim();
string entityclassuri = ddlAddNewPropertyList.SelectedValue.Trim();
Session["pnlAddBySearch.Visible"] = null;
Session["pnlAddByURI.Visible"] = null;
Int64 entityid = 0;
entityid = data.AddNewEntity(newentity, entityclassuri);
data.AddExistingEntity(this.SubjectID, this.PredicateID, entityid);
this.LoadEntityGrid(true);
}