Collection: - Collections are basically group of
records which can be treated as a one logical unit.
.NET Collections are divided in to four important categories as follows.
- Indexed based.
- Key Value Pair.
- Prioritized Collection.
- Specialized Collection.
Let’s begin with Indexed based and key value pair.
Indexed based: - It helps you to access the value of row
by using the internal generated index number by the collection.
Key Value Pair: - It helps you to access value by the
user defined key.
Below is the example of country collection for Indexed based and key
When you want to access India through Index based you have to write like
MessageBox.Show(myarray); //for array
MessageBox.Show(mylist); //for list
Now, when we want to access the same output “India” by Key value pair.
MessageBox.Show(myhash["IND"].ToString()); //for hashtable
Prioritized Collection: -It helps us to get the element
in a particular sequence.
Specialized Collection: -It is very specific collections
which are meant for very specific purpose like hybrid dictionary that start
as list and become hashtable.
For more detail on collections watch the below video.
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