public void RemoverICMS(ICMSArmazenado imp)
 {
     icms.Remove(imp);
     if (icms.Count > 0)
     {
         Root.ICMS = icms.ToXElement <List <ICMSArmazenado> >()
                     .ToString(SaveOptions.DisableFormatting);
     }
     else
     {
         Root.ICMS = null;
     }
 }
 public void AdicionarICMS(ICMSArmazenado imp)
 {
     icms.Add(imp);
     Root.ICMS = icms.ToXElement <List <ICMSArmazenado> >()
                 .ToString(SaveOptions.DisableFormatting);
 }