Create instance of generic type whose constructor requires a parameter?

by

Additionally a simpler example:

return (T)Activator.CreateInstance(typeof(T), new object[] { weight });

Note that using the new() constraint on T is only to make the compiler check for a public parameterless constructor at compile time, the actual code used to create the type is the Activator class.

You will need to ensure yourself regarding the specific constructor existing, and this kind of requirement may be a code smell (or rather something you should just try to avoid in the current version on c#).

More Related Contents:

  1. Pass An Instantiated System.Type as a Type Parameter for a Generic Class
  2. How to get the type of T from a member of a generic class or method
  3. ArrayList vs List in C#
  4. Why isn’t there generic variance for classes in C# 4.0?
  5. Does .NET have a way to check if List a contains all items in List b?
  6. Making a generic property
  7. foreach vs someList.ForEach(){}
  8. Why cannot C# generics derive from one of the generic type parameters like they can in C++ templates? [duplicate]
  9. How do I implement IEnumerable
  10. No type inference with generic extension method
  11. Passing a single item as IEnumerable
  12. How do I make the return type of a method generic?
  13. Static Generic Class as Dictionary
  14. Get a generic method without using GetMethods
  15. explicitly cast generic type parameters to any interface
  16. Generics: casting and value types, why is this illegal?
  17. Generic List – moving an item within the list
  18. C# Generic Type Inference With Multiple Types
  19. Why generic IList does not inherit non-generic IList
  20. Declare a generic type instance dynamically [duplicate]
  21. Why can’t I assign a List to a List?
  22. List readonly with a private set
  23. Mocking generic methods in Moq without specifying T
  24. Why doesn’t C# support implied generic types on class constructors?
  25. Implementing arithmetic in generics?
  26. .NET Casting Generic List
  27. Are static members of a generic class tied to the specific instance?
  28. Convert DataTable to List
  29. Why it is not possible to define generic indexers in .NET?
  30. generic NOT constraint where T : !IEnumerable

Leave a Comment