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Is there a particular way to initialize an IList<T>? This does not seem to work:
IList<ListItem> allFaqs = new IList<ListItem>(); // Error I get here: Cannot create an instance of the interface 'IList<ListItem>' ReSharper suggests to initialize it like so:
IList<ListItem> allFaqs = null; But won't that cause a Null Reference Exception when I go to add items to this list?
Or should I just use List<ListItem>?
Thanks!
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IList<ListItem> allFaqs = new List<ListItem>(); and it should compile. You'll obviously have to change the rest of your code to suit too. IList<ListItem> test = new ListItem[5]; IList<ListItem> test = new ObservableCollection<ListItem>(allFaqs);
List and IList are used to denote a set of objects. They can store objects of integers, strings, etc. There are methods to insert, remove elements, search and sort elements of a List or IList. The major difference between List and IList is that List is a concrete class and IList is an interface.
In C# IList interface is an interface that belongs to the collection module where we can access each element by index. Or we can say that it is a collection of objects that are used to access each element individually with the help of an index. It is of both generic and non-generic types.
IList Interface (System.
The error is because you're trying to create an instance of the interface.
Change your code to:
List<ListItem> allFaqs = new List<ListItem>(); or
IList<ListItem> allFaqs = new List<ListItem>(); and it should compile.
You'll obviously have to change the rest of your code to suit too.
You can create any concrete type that implements IList like this, so
IList<ListItem> test = new ListItem[5]; IList<ListItem> test = new ObservableCollection<ListItem>(allFaqs); and so on, will all work.
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