List Capacity vs Count

 That's correct! In the .NET framework, the List<T> class is implemented as an array that grows dynamically as items are added to it. The Capacity property represents the size of the underlying array, and the Count property represents the number of items that have been added to the list.

When you add an item to the list and the list is already at capacity, the List<T> class will automatically double the size of the underlying array and copy all of the items from the old array to the new one. This process is known as "resizing the array."

It's important to note that the Capacity property is not the same as the Count property. The Capacity property represents the size of the underlying array, while the Count property represents the number of items that have been added to the list. The Count property will always be less than or equal to the Capacity property.

For example, if you have a list with a capacity of 10 and you add 5 items to it, the Count property will be 5 and the Capacity property will be 10. If you then add another item to the list, the list will automatically resize the array and the Capacity property will be increased to 20. However, the Count property will still be 6.