LINQ

string[] words = { "hello", "wonderful", "linq", "beautiful", "world" };
or
string[] words = new string[] { "hello", "wonderful", "linq","beautiful", "world" };

var shortWords =
from word in words
where word.Length <= 5
select word;

foreach (var item in shortWords)
Console.WriteLine(item);

var s = words.Where(c => c.Length <= 5);

foreach (var item in s)
Console.WriteLine(item);

------------------------------------------------------

UnType Array

Object[] array = { "String", 12, true, 'a' };
foreach (var item in array)
 Console.WriteLine(item);

var types = array.Select(item => item).Select(item => item.GetType().Name);
foreach (var item in types)
Console.WriteLine(item);

------------------------------------------------------

Multiple Object and LINQ -Filtering, sorting,comparing

    class Book
    {
        public string Title { get; set; }
    }

List<Book> books = new List<Book>()
            {
                                                  new Book { Title="LINQ in Action" },
                                                  new Book { Title="LINQ for Fun" },
                                                  new Book { Title="Extreme LINQ" }
            };
or

    Book[] books = {
                        new Book { Title="LINQ in Action" },
                        new Book { Title="Action for Fun" },
                        new Book { Title="Extreme LINQ" }
                    };

    var titles = books.Where(book => book.Title.Contains("Action")).Select(book => book.Title);

 foreach (var item in titles)
 Console.WriteLine(item);

Single object -check length,contain any string or find self attribute value

Book b = new Book();
b.Title = "pravin patil";

var s = b.Title.Length.Equals(("pravin patil").Length);
Console.WriteLine(s);


LINQ to XML

string usersName = "pravin";

XElement name = new XElement("name", usersName);
Console.WriteLine(name);

Output

<name>pravin</name>
------------------------------------------------------

void Main()
{
  XElement name = new XElement("method", GetUsersName());
  Console.WriteLine(name);
}
private string GetUsersName() { return "method content can keep in xml"; }

Output
<method>method content can keep in xml</method>
------------------------------------------------------
XElement x= new XElement("book", new XAttribute("pubDate", "July 31, 2006"));
Console.WriteLine(x);
Result
<book pubDate="July 31, 2006" />
------------------------------------------------------


XElement x= new XElement("book", "hi how are you",new XAttribute("pubDate", "July 31, 2006"));
Console.WriteLine(x);
Result
<book pubDate="July 31, 2006">hi how are you</book>
------------------------------------------------------

XElement book = new XElement("book",new XAttribute("publicationDate", "October 2005"));
Console.WriteLine(book);


Output

<book publicationDate="October 2005" />

------------------------------------------------------

XElement cricket = new XElement("cricket");
cricket.Add(new XElement("Team",
 new XAttribute("TeamName", "India"),
 new XElement("batsman", "sachin",new XAttribute("Rank",1)),
 new XElement("bowler", "ashwin")
)
);
XElement Team = new XElement("Team");
Team.Add( new XAttribute("TeamName", "AUS"),
  new XElement("batsman", "asdas"),
   new XElement("bowler", "asdasd")
);
cricket.Add(Team);
Console.WriteLine(cricket);

<cricket>
  <Team TeamName="India">
    <batsman Rank="1">sachin</batsman>
    <bowler>ashwin</bowler>
  </Team>
  <Team TeamName="AUS">
    <batsman>asdas</batsman>
    <bowler>asdasd</bowler>
  </Team>
</cricket>

------------------------------------------------------

cricket.Add(new XElement("Team",
    new XAttribute("TeamName", "India"),
    new XElement("batsman", "sachin",new XAttribute("Rank",1)),
    new XElement("bowler", "ashwin")
  ),
  new XElement("Team",
    new XAttribute("TeamName", "AUS"),
    new XElement("batsman", "sdf",new XAttribute("Rank",1)),
    new XElement("bowler", "sdf")
  )
);
Console.WriteLine(cricket);

<cricket>
  <Team TeamName="India">
    <batsman Rank="1">sachin</batsman>
    <bowler>ashwin</bowler>
  </Team>
  <Team TeamName="AUS">
    <batsman Rank="1">sdf</batsman>
    <bowler>sdf</bowler>
  </Team>
</cricket>

------------------------------------------------------

XElement book = new XElement("book");
book.Add(new XElement("author", "Don Box"));
book.Add(new XElement("title", "Essential .NET"));

XElement bag = new XElement("bag");
bag.Add(book);
Console.WriteLine(bag);

<bag>
  <book>
    <author>Don Box</author>
    <title>Essential .NET</title>
  </book>
</bag>
------------------------------------------------------

XElement books = XElement.Parse(

@"<books>
<book>
<title>abc</title>
<author>xxx</author>
</book>
</books>");
books.Element("book").Element("author").ReplaceNodes("foo");

Console.WriteLine(books);

<books>
  <book>
    <title>abc</title>
    <author>foo</author>
  </book>
</books>

------------------------------------------------------

XElement books = XElement.Parse(
@"<books>
 <book>
  <title>LINQ in Action</title>
  <author>Steve Eichert</author>
 </book>
</books>");
books.Element("book").SetElementValue("author", "foo");
Console.WriteLine(books);

<books>
  <book>
    <title>LINQ in Action</title>
    <author>foo</author>
  </book>
</books>
------------------------------------------------------

XElement books = XElement.Parse(
@"<books>
<book>
<title>aaa</title>
<author>bbb</author>
</book>
</books>");
books.Element("book").ReplaceNodes(
new XElement("title", "Ajax in Action"),
new XElement("author", "no")
);

Console.WriteLine(books);

<books>
  <book>
    <title>Ajax in Action</title>
    <author>no</author>
  </book>
</books>

------------------------------------------------------

public void FetchFunctionInfo(string functionid)
{
XElement xEle = XElement.Load(Server.MapPath("~\\images\\joblist\\FunctionalDesc.xml"));

var emp = xEle.Descendants("function").Where(func => (string)func.Attribute("functionid") == functionid);

 var emps = from nm in xEle.Descendants("function")
                           where (string)nm.Attribute("functionid") == functionid
                           select nm;
         foreach (var item in emp)
              Response.Write(item);
      }