Cannot apply indexing with [] to an expression of type ICollection

Question

Can someone please provide code to fix this error?

\"Cannot apply indexing with [] to an expression of type \'ICollection\'

Essentially, I\'m trying to

Answer 1

ICollections are not ordered, so that cannot be indexed.

Instead, you should use a separate ViewModel class with IList<T> property.

Answer 2

Use IList

public  class A
{
   public int Name { get; set; }
   public virtual IList<B> Bs { get; set; }
}