Cannot apply indexing with [] to an expression of type 'System.Collections.Generic.ICollection in mvc controller

Question

public ActionResult addstandardpackage1(ICollection SingleStay,ICollection DOUBLESTAY,ICollection TRIBLESTAY,ICollection FAMI         


        

Answer 1

ICollection doesn't expose indexer. You have three options:

1. Change ICollection to IList
2. Use ElementAt that is inherited from IEnumerable. But be aware - it could not be efficient.
3. Evalute passed collection to list (ToList())

ICollection (and its exposed methods) on msdn.