What will happen if you define page_load event in design page as well as in code behind in asp.net. which will execute ?

The page_load method which is defined in aspx page or design page will only run. Design page page_load method precedence is more.

What is the significance of AutoEventWireUp in asp.net?

Gets or sets a value indicating whether events for ASP.NET pages are automatically connected to event-handling functions.

If AutoEventWireUp attribute is true then asp.net apges automatically connected to event-handling function, otherwise not.

The default value of AutoEventWireUp id true.

When AutoEventWireup is true, ASP.NET does not require that you explicitly bind event handlers to a page event such as Load.

When AutoEventWireup is false, you must explicitly bind the event to a method. For example, if you have a Page_Load method in the code for a page, the method will be called in response to the Load event only if you write code like that in the following example.

Example:-

Here AutoEventWireUp attribute value is false.

protected void Page_Load(object sender, EventArgs e)

    {

        Label1.Text = DateTime.Now.ToLongTimeString();

    }

For above example AutoEventWireup is false, so it will not show date on label control on web page.

Note:- 

•   If you set AutoEventWireup to true, make sure that you do not also manually attach page event handlers to events. If you do, handlers might be called more than one time.

• Automatic binding is performed only for page events, not for events for controls on the page.

• As an alternative to binding events to handlers, you can override the Oneventname methods of the page or of controls.

Like operator in Linq using c#.

There are following ways to achieve like operator in Linq

1.)   Using StartsWith :- 
       var studentList = from s in Students where s.Stud_sname.StartsWith("M") select s 

2.)   Using EndsWith :- 
      var studentList = from s in Journals where s.Stud_sname.EndsWith("T") select s

 3.)   Using SqlMethods :- 
      For this use have to use System.Data.SqlClient namespace
     Var studentList = from m in Journals where   SqlMethods.Like(s.Stud_sname,"Ram%") select   s

  4.)   Using Contains :- 
      var studentList = from s in Journals where s.Stud_sname.Contains("Ram") select m

What will happen if we declare DataMember attribute as static On DataContract in WCF?

DataMemberAttribute attribute is ignored if it is applied to static member.