I need to create a generic type, but I do not know the type at compile time. I would like to do this:
Type t = typeof(whatever);
var list = new List<t>
this won't compile, because t is not a valid type. But it does know all about a valid type. Is there a way to dynamically create the generic list from a System.Type like this? I may need reflection, and that's ok, I am just a bit lost here.
If you call the GetGenericTypeDefinition method on a Type object that already represents a generic type definition, it returns the current Type. An array of generic types is not itself generic. In the C# code A<int>[] v; or the Visual Basic code Dim v() As A(Of Integer) , the type of variable v is not generic.
The object type is an alias for System. Object in . NET. In the unified type system of C#, all types, predefined and user-defined, reference types and value types, inherit directly or indirectly from System.
Like this:
Type t;
Type genericListType = typeof(List<>).MakeGenericType(t);
object list = Activator.CreateInstance(genericListType);
Note that you can only assign it to a variable of type object
. (Although you can cast to to the non-generic IList
interface)
To use the list
variable, you'll probably need reflection.
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