Language Integrated Query (LINQ): Part 2

As I said in previous article, with LINQ you just need to perform three distinct actions: Obtain the Data Source, create the query and execute the query. You will see in sample programs given below. We will create Console Apps and test various LINQ concepts. I will walk through very simple programs here and in subsequent parts will dig in depth.

LINQ has the great ability to query on any source of data that could be collections of objects (in-memory data, like an array), SQL Database or XML files. We can easily retrieve data from any object that implements the IEnumerable<T> interface.

LINQ to Array

Let's look at a Program to find Even Numbers using LINQ to Array.

If you execute the above program, you will get "2 4 6 8 10" as the output. You will notice 3 actions above, these actions will be changed always depending upon our project requirements. In the above example, the "data source" was an array that implicitly supports the generic IEnumerable<T> interface.

LINQ to XML