extends The wildcard declaration of List<? extends Number> foo3 means that any of these are legal assignments: List<? extends Number> foo3 = new ArrayList<Number>(); // Number “extends” Number (in this context) List<? extends Number> foo3 = new ArrayList<Integer>(); // Integer extends Number List<? extends Number> foo3 = new ArrayList<Double>(); // Double extends Number Reading – … Read more
I have to ask a question in return: is your GenSet “checked” or “unchecked”? What does that mean? Checked: strong typing. GenSet knows explicitly what type of objects it contains (i.e. its constructor was explicitly called with a Class<E> argument, and methods will throw an exception when they are passed arguments that are not of … Read more
You need to use reflection to get the method to start with, then “construct” it by supplying type arguments with MakeGenericMethod: MethodInfo method = typeof(Sample).GetMethod(nameof(Sample.GenericMethod)); MethodInfo generic = method.MakeGenericMethod(myType); generic.Invoke(this, null); For a static method, pass null as the first argument to Invoke. That’s nothing to do with generic methods – it’s just normal reflection. … Read more
Since Enum Type implements IConvertible interface, a better implementation should be something like this: public T GetEnumFromString<T>(string value) where T : struct, IConvertible { if (!typeof(T).IsEnum) { throw new ArgumentException(“T must be an enumerated type”); } //… } This will still permit passing of value types implementing IConvertible. The chances are rare though.
The easiest way I can think of is to use Linq: List<Order> SortedList = objListOrder.OrderBy(o=>o.OrderDate).ToList();