What is the difference between abstraction and encapsulation?

Abstraction:
Abstraction lets you focus on what the object does instead of how it does it

That means we use the object without knowing the source code of the class.

Encapsulation:
Encapsulation means hiding the internal details or mechanics of how an object does something.

Encapsulation is wraping data into single unit.

What is the difference between classes and structs in Microsoft.Net?

• A struct is a value type, while a class is a reference type.
• When we instantiate a class, memory will be allocated on the heap. When struct gets initiated, it gets memory on the stack.
• Classes can have explicit parameter less constructors. But structs cannot have this.
• Classes support inheritance. But there is no inheritance for structs. A struct cannot inherit from another struct or class, and it cannot be the base of a class. Like classes, structures can implement interfaces.
• We can assign null variable to class. But we cannot assign null to a struct variable, since structs are value type.
• We can declare a destructor in class but can not in struct.

Sql-Server, find Duplicate Rows with Count

select Count(ID), Name, Email,Comment
FROM TableName     
group by Name, Email,Comment
having Count(ID)>1

How to use cufon.replace inside UpdatePanel?

Place below code inside Update Panel 

<script type="text/javascript" language="javascript">
  Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
  function EndRequestHandler(sender, args)
  {
   Cufon.replace('h1');
   Cufon.now();  

 }
<script>

how can I jump to the top of page using UpdatePanel?

<script type="text/javascript" language="javascript">
  Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
  function EndRequestHandler(sender, args)
  {
  scrollTo(0,0);
  }
<script>

Difference between JOIN and INNER JOIN

SELECT * FROM table JOIN otherTable ON table.ID = otherTable.FK

OR

SELECT * FROM table INNER JOIN otherTable ON table.ID = otherTable.FK

They function the same. INNER JOIN can be a bit more clear to read, especially if your query has other join types (e.g. LEFT or RIGHT) included in it.

Similarly with OUTER JOINs the word "OUTER" is optional, its the LEFT or RIGHT keyword that makes the JOIN an "OUTER" JOIN.

However for some reason I always use "OUTER" as in LEFT OUTER JOIN and never LEFT JOIN, but I never use INNER JOIN but rather I just use "JOIN"

Sql - server - Find Last updated stored procedures

SELECT name, create_date, modify_date
FROM sys.objects
WHERE type = 'P'
ORDER BY modify_date desc, create_date desc

SQL-Server - Generalized Paging Query That Includes Sorting Clauses

SELECT TOP page_size * FROM table WHERE primary_key NOT IN
(SELECT TOP page_size * (page_number - 1) primary_key FROM table
WHERE filter_conditions
ORDER BY sort_field)
AND filter_criteria
ORDER BY sort_field

How do I open PDF's to specific pages?

Open a PDF to a specific page from a web-server
1. Use name/destination pairs when you Distill your PDF document. Please refer to the https://partners.adobe.com/asn/acrobat/sdk/explodedSDK/Documentation/PDF_Creation_APIs/pdfmarkReference.pdf This is designed for PostScript engineers or for those who are generating their own PostScript.
2. Use a highlight file.
3. append #page=x [where x is the page number].
4. Select File > Document Properties > Open Options and target the page and view you want. This is the easiest, but least flexible method, as you get exactly one view that you can open to.

JavaScript function to check/Uncheck all the check boxes on a form

function CheckAll(flag) {
var fmobj = document.friendbox;
for (var i=0;i {
var e = fmobj.elements[i];
if(e.type=='checkbox')
{
if(flag=='false')
e.checked = false;
else
e.checked = true;
}
}
}