c# - How to combine two more List<> parameters? -


i have 5 different web service

list<_filta> a= new list<_filta>();           list<_filtb> b= new list<_filta>();          list<_filtc> c= new list<_filta>();    list<_filtd> d= new list<_filta>();           list<_mainfilt> main= new list<_mainfilt>();

and 4 different method , 1 [webmethod] each list's parameters ex:

       [webmethod]            public list<_mainfilt> search(string p1,int p2 ...)             {                code here...               _filta= _filta(someparameters); //go filta method              _filtb= _filtb(someparameters);                   .                   .                   code...                   .                   .               return search;   //get seach values              }             public list<_filta> filta (someparameters)         {            _filta flg3 = new _filta();               codes....                flg3 = new _filta                             {                                 pricelink = link,                                 price = valuesomething,                                 price2 = valuesomething1                             };                             search.add(flg3);             return filta ;          }

and 3 more method this.

i want combined these 4 list (_lista,_listb,_listc,_listd) in list<_mainfilt> how can combined? or suggestion solving problem?

instead of returning list<_mainfilt>, return object containing 4 lists of filters, e.g:

public class filters {   public list<_filta> filtera {get; set;}   public list<_filtb> filterb {get; set;}   public list<_filtc> filterc {get; set;}   public list<_filtd> filterd {get; set;} }  ...  [webmethod] public filters search(string p1,int p2 ...) {   return new filters {     filtera = _filta(someparameters),     filterb = _filtb(someparameters),     filterc = _filtc(someparameters),     filterd = _filtd(someparameters),   }; }

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