Sometimes you have a list, and you need to return a single element from the list. There are several ways to get the element to return. Below are two ways using LINQ with Lambda expressions.
Consider the following class:
1: public class Person
2: {
3: [...]
Here's a simple example to show you how to GroupBy Multiple Values
using LINQ. In this example, I am grouping by Age and Sex to find the
count of people who have the same age and sex.
C#
public partial class LINQ : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
List<Employee> empList = new List<Employee>();
empList.Add(new Employee() [...]
The
‘GroupBy’ feature in LINQ is amazing and very powerful. When you use a
‘GroupBy’ in LINQ, internally it calls an extension method which
returns a sequence of System.Collections.Generic.IEnumerable<(Of
<(IGrouping<(Of <(TKey, TSource>)>)>)>)
The
GroupBy<(Of <(TSource, TKey>)>)(IEnumerable<(Of
<(TSource>)>), Func<(Of <(TSource, TKey>)>))
method returns a collection of IGrouping<(Of <(TKey,
TElement>)>) objects, one for each distinct key that was
encountered. The key represents the attribute that is common [...]
Twitter feeds are provided in RSS XML format. This makes it very easy for us to parse out the information we want from a feed using LINQ to XML. For example, if we want to grab the message and date of each Twitter entry, we could use something like this:
public class Twitter
{
public string Message [...]
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