Cast IList to List

Question

I am trying to cast IList type to List type but I am getting error every time   List lt SubProduct gt  subProducts  Model subproduct    Model subproduct returns IList lt SubProduct gt

User · Answer

List lt SubProduct gt  subProducts   List lt SubProduct gt  Model subproduct    The implicit conversion failes because List lt  gt  implements IList  not viceversa  So you can say IList lt T gt  foo   new List lt T gt     but not List lt T gt  foo    some IList-returning method or property

User · Answer

public async Task lt List lt TimeAndAttendanceShift gt  gt  FindEntitiesByExpression Expression lt Func lt TimeAndAttendanceShift  bool gt  gt  predicate                IList lt TimeAndAttendanceShift gt  result   await  dbContext Set lt TimeAndAttendanceShift gt    Where predicate  ToListAsync lt TimeAndAttendanceShift gt              return result ToList lt TimeAndAttendanceShift gt

User · Answer

List lt ProjectResources gt  list   new List lt ProjectResources gt             IList lt ProjectResources gt  obj    Your Data Will Be Here   list   obj ToList lt ProjectResources gt       This Would Convert IList Object to List Object

User · Answer

This is the best option to cast convert list of generic object to list of string   object valueList  List lt string gt  list     IList valueList  Cast lt object gt    Select o   gt  o ToString    ToList

User · Answer

If you have an IList containing interfaces  you can cast it like this   List to IList  List lt Foo gt  Foos   new List lt Foo gt      IList lt IFoo gt  IFoos   Foos ToList lt IFoo gt       IList to List  IList lt IFoo gt  IFoos   new List lt IFoo gt     List lt Foo gt  Foos   new List lt Foo gt  IFoos Select x   gt   Foo x      This assumes Foo has IFoo interfaced

User · Answer

How about this   List lt SubProduct gt  subProducts   Model subproduct ToList

User · Answer

Try  List lt SubProduct gt  subProducts   new List lt SubProduct gt  Model subproduct     or   List lt SubProduct gt  subProducts   Model subproducts as List lt SubProduct gt

User · Answer

The other answers all recommend to use AddRange with an IList   A more elegant solution that avoids the casting is to implement an extension to IList to do the job   In VB NET    lt Extension   gt  Public Sub AddRange Of T  ByRef Exttype As IList Of T   ElementsToAdd As IEnumerable Of T      For Each ele In ElementsToAdd       Exttype Add ele     Next End Sub    And in C    public void AddRange lt T gt  this ref IList lt T gt  Exttype  IEnumerable lt T gt  ElementsToAdd        foreach  var ele in ElementsToAdd                Exttype Add ele

User · Answer

In my case I had to do this  because none of the suggested solutions were available   List lt SubProduct gt  subProducts   Model subproduct Cast lt SubProduct gt    ToList

[c#] Cast IList to List

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