public FindFilter(string field, FilterOperator oper, string val, FilterConjuctionOperator conj)
 {
     this.fieldname      = field;
     this.filteroperator = oper;
     this.filtervalue    = val;
     this.conjuction     = conj;
 }
 public FindFilter Add(string field, FilterOperator oper, string val, FilterConjuctionOperator conj)
 {
     return(this.Add(new FindFilter(field, oper, val, conj)));
 }