For example I have a generic class KeyAndValue
public class KeyAndValue<T, U>
{
public T? key { get; set; }
public U? value { get; set; }
}
Now I want to instantiate a LinkedListNode<KeyAndValue<int, int>>
object
var newNode = new LinkedListNode<KeyAndValue<int, int>>();
I received warning like this
There is no argument given that corresponds to the required formal parameter 'value' of 'LinkedListNode<KeyAndValue<int, int>>.LinkedListNode(KeyAndValue<int, int>)' [146]",
My question is how to create an object that is generic type of generic type?
You can use the existing class KeyValuePair
instead of KeyAndValue
. Additional you can create a constructor:
public class KeyAndValue<T, U>
{
public KeyAndValue(T key, U value)
{
this.key = key;
this.value = value;
}
public T? key { get; set; }
public U? value { get; set; }
}
Both is possible:
var keyValuePair = new KeyValuePair<int, int>(0, 5);
var linkedListNode1 = new LinkedListNode<KeyValuePair<int, int>>(keyValuePair);
var keyAndValue = new KeyAndValue<int, int>(0, 5);
var linkedListNode2 = new LinkedListNode<KeyAndValue<int, int>>(keyAndValue);
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