KeyValuePair with generic values [closed]

by

First of all, List<T> accepts only one generic argument, so you cannot specify both string and KeyValuePair<string, T>. As pointed out, maybe you mean a Dictionary<K, V>?

Generally, your code with the T argument is only possible if it appears within a generic method or class that itself accepts a type argument named T.

If you expect to be able to store different elements (i.e. various types for T) in your list; that is not possible. Imagine, if every item had a different T, what advantage would typing to T make in the first place? You couldn’t make any assumptions about the values as their type would be unknown. Therefore, all you can do is specify the most specific common base type of all types that your values can possibly belong to – possibly System.Object, if they really don’t share any other common traits.

More Related Contents:

  1. How do I use reflection to call a generic method?
  2. How to Sort a List by a property in the object
  3. Convert generic List/Enumerable to DataTable?
  4. Passing arguments to C# generic new() of templated type
  5. C# – Multiple generic types in one list
  6. Create instance of generic type whose constructor requires a parameter?
  7. What is cool about generics, why use them?
  8. IEnumerable and Recursion using yield return
  9. convert a list of objects from one type to another using lambda expression
  10. Func with out parameter
  11. Setting generic type at runtime
  12. Convert string to nullable type (int, double, etc…)
  13. How can I use interface as a C# generic type constraint?
  14. Generic Way to Check If Entity Exists In Entity Framework?
  15. Is there a C# generic constraint for “real number” types? [duplicate]
  16. Why does IEnumerator inherit from IDisposable while the non-generic IEnumerator does not?
  17. Generic methods and method overloading
  18. ThreadStatic v.s. ThreadLocal: is generic better than attribute?
  19. What is ‘1 in Collection type Name
  20. C# – static types cannot be used as type arguments
  21. Can I have a variable number of generic parameters?
  22. Which C# method overload is chosen?
  23. Calling generic static method in PowerShell
  24. What is the equivalent of Java wildcards in C# generics
  25. Overload resolution issue for generic method with constraints
  26. Creating a generic method in C#
  27. The component does not have a resource identified by the uri
  28. C# generic methods, type parameters in new() constructor constraint
  29. How does Java’s use-site variance compare to C#’s declaration site variance?
  30. Convert DataTable to Generic List in C#

Leave a Comment