A Lambda expression is nothing but an Anonymous Function, can contain expressions and statements. Lambda expressions can be used mostly to create delegates or expression tree types. Lambda expression uses lambda operator => and read as ‘goes to’ operator.
Left side of this operator specifies the input parameters and contains the expression or statement block at the right side.
Example: myExp = myExp/10;
Now, let see how we can assign the above to a delegate and create an expression tree:
delegate int myDel(int intMyNum);
static void Main(string[] args)
{
//assign lambda expression to a delegate:
myDel myDelegate = …

DataContract is belongs to Class.
ServiceContract is belongs to Interface
OperationContract is belongs to Method
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Close() Vs Dispose Method
The basic difference between Close() and Dispose() is, when a Close() method is called, any managed resource can be temporarily closed and can be opened once again. It means that, with the same object the resource can be reopened or used. Where as Dispose() method permanently removes any resource ((un)managed) from memory for cleanup and the resource no longer exists for any further processing.
Example showing difference between Close() and Dispose() Method:
[Code]
using System;
using System.Data;
using System.Data.SqlClient;
public class Test
{
private string connString = “Data Source=COMP3;Initial Catalog=Northwind;User Id=sa;Password=pass”;
private SqlConnection connection;
public Test()
{
connection = …

<object classid=”clsid:D27CDB6E-AE6D-11cf-96B8-444553540000″ id=”name” width=”468″ codebase=”http://active.macromedia.com/flash4/cabs/swflash.cab#version=4,0,0,0″ height=”60″>
<param value=”http://www.msdotnetheaven.com/shubhhostingDiwali.swf” name=”movie”/>
<param value=”high” name=”quality”/>
<param value=”transparent” name=”wmode”/>
<embed
pluginspage=”http://www.macromedia.com/shockwave/download/index.cgi?
P1_Prod_Version=ShockwaveFlash” quality=”high” type=”application/x-shockwave-flash” height=”60″ src=”http://www.msdotnetheaven.com/shubhhostingDiwali.swf” width=”468″ wmode=”transparent” name=”name”>
</embed>
</object>
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By default width of column handled automatically, means columns in Gridview control are sized automaticlaly internally column cells redered as HTML cell. On the basis of requirement one can set the width dynamically also.
Following are the steps to do it;
1. Setting Column Width Dynamically:
Through code, set the width property on the ItemStyle of GridView.
Following is the code-snippet for the same:
VB.NEt:
[CODE]
Dim intColWidth As Integer = 25
GridView1.Columns(0).ItemStyle.Width = intColWidth
[/CODE]
C#:
[CODE]
int intColWidth = 25;
GridView1.Columns(0).ItemStyle.Width = intColWidth;
[/CODE]
2. Setting Column width as per Data-Content :
Write following piece of code in RowDataBound handler / event:
Note: Code is …