c# - Factory Design Pattern Generic return Type -

i want implement factory design pattern generic return type. have created example can't work. how can factory return type of generic , how use in main class. here code:

namespace consoleapplication1 {     using system;     using system.collections.generic;     class mainapp     {         static void main()         {             factory fac = new factory();             ipeople<t> pep = fac.getpeople(peopletype.rural);             console.writeline(pep.getlist());         }     }      public interface ipeople<t>     {         list<t> getlist();     }      public class villagers : ipeople<domainreturn1>     {         public list<domainreturn1> getlist()         {             return new list<domainreturn1>();         }     }      public class citypeople : ipeople<domainreturn2>     {         public list<domainreturn2> getlist()         {             return new list<domainreturn2>();         }     }      public enum peopletype     {         rural,         urban     }      /// <summary>     /// implementation of factory - used create objects     /// </summary>     public class factory     {         public ipeople<t> getpeople(peopletype type)         {             switch (type)             {                 case peopletype.rural:                     return (ipeople<domainreturn1>)new villagers();                 case peopletype.urban:                     return (ipeople<domainreturn2>)new citypeople();                 default:                     throw new exception();             }         }     }      public class domainreturn1     {         public int prop1 { get; set; }      }      public class domainreturn2     {         public int prop2 { get; set; }     } } 

you don't have pass enum factory, t type parameter can used select appropriate product this:

public class factory {     public ipeople<t> getpeople<t>()     {         if(typeof(t) == typeof(domainreturn1))             return (ipeople<t>)new villagers();          if(typeof(t) == typeof(domainreturn2))             return (ipeople<t>)new citypeople();          throw new exception();     } } 

and can use this:

factory factory = new factory();  var product1 = factory.getpeople<domainreturn1>();  var product2 = factory.getpeople<domainreturn2>();