I know there are many posts dedicated to this topic. For example, Sara Ford posted about 290 shortcuts on her blog. Check Zain Naboulsi blog for VS 2010 tips.

But it’s almost impossible to use all of them on daily basis. And further most of them are really not that useful. Here are 10 of my favorite Visual Studio keyboard shortcuts, ones I use most..

1) Double TAB

If you know snippet key name, write and click double Tab.

For example: Write

If

and then click tab key twice to get

if (true)
{
    
}

Similarly write try then click tab key twice to get

try
{

}
catch (Exception)
{
    
    throw;
}

3) CTRL+K and CTRL+D to format code

4) CTRL+SHIFT+V to cycle through clipboard

5) SHIFT+ALT+ENTER for full screen mode

6) F7 to switch between code behind and .aspx files

7) CTRL+H or CTRL+SHIFT+H for find and replace

8) Ctrl+F5 to run without debugging. F5 only will run in debugging mode

    F11 to step into a method. SHIFT+F11 to step out of a method. F10 to step over a method.

9) F9 toggle and un-toggle breakpoints

10)F12 to go to definition

What’s your favorite Visual Studio keyboard shortcut/hidden feature/trick..?

With VS 2008 and IE 8, JavaScript debugging is automatically enabled even if script debugging is set to disabled in IE8 settings. This will help developers in debugging scripts without having to change debugging features within browser. While this is a good feature for most developers, it takes up to 10X time to load a page that is heavy on client side scripts. 

How to disable script debugging in IE8?

Go to a Command Prompt (cmd) and Enter… 

reg add HKLM\SOFTWARE\Microsoft\VisualStudio\9.0\AD7Metrics\Engine\{F200A7E7-DEA5-11D0-B854-00A0244A1DE2} /v ProgramProvider /d {4FF9DEF4-8922-4D02-9379-3FFA64D1D639} /f 

To enable it again go to the Command Prompt and Enter...

reg add HKLM\SOFTWARE\Microsoft\VisualStudio\9.0\AD7Metrics\Engine\{F200A7E7-DEA5-11D0-B854-00A0244A1DE2} /v ProgramProvider /d {170EC3FC-4E80-40AB-A85A-55900C7C70DE} /f 

Tip from:Gregg Miskelly of Visual Studio team debugger team

Web Site Project is deployed with source code to the server and all compilation takes place at runtime.

Web Application Projects, the code behind classes are compiled to dll. That dll is deployed and at runtime, the compiled code in the dll and the markup is combined to create a class which is used by the server to render output.

Update:

Good post by anthony on this

post by Stephen on this topic

In C# 3.0, you can declare an integer  as –

It will return”Int32” as DateType, even though we declare it as “var”. So what  is “var”?

from MSDN..

Local variables can be given an inferred "type" of var instead of an explicit type. The var keyword instructs the compiler to infer the type of the variable from the expression on the right side of the initialization statement.

To put it simply "var" is a keyword that results in variable being of the same data type, of the initializer. It works similar to “object” type in older version. But there is great difference between “Object” and “var”. Check following code snippet-

So Objects have boxing and unboxing issues. Now consider same instance with “var”- 

1)       Multi-Targeting Support

2)       Vertical Split View :

This feature show both design and source code in single window.  To enable vertical split-view orientation in VS 2008, select the tools->options menu item and go to the HTML Designer->General section.  Then check the "Split views vertically"  checkbox

3)       Javascript Debugging

Visual Studio 2008 makes it is simpler with javascript debugging. You can set break points and run the javaScript step by step and you can watch the local variables when you were debugging the javascript and solution explorer provides javascript document navigation support.

4)       Web Design and CSS Support

 Microsoft has added new Web Design and CSS Support to Visual Studio 2008

5)       AJAX & Silverlight Library support for ASP.NET

Previously developer has to install AJAX control library separately that does not come from VS, but now if you install Visual Studio 2008, you can built-in AJAX control library. Also in VS 2008 Silverlight Library is inbuilt.

6)       Access to .NET Framework Source Code

you can debug the source code of .NET Framework Library methods.

1.) We were facing timeout issue on one of our servers. Web.config settings had no effect on the time out.

2.) I have set the session to last 24 hours with this statement in my web.config:

		
	
		<sessionState mode="InProc" timeout="720"/>	
	
	
	

     But the session still ends after 20 min of inactivity. What am I missing here?

I saw similar type of questions frequently in Asp.Net forums. Here is a post to help those

What is Session State?

ASP.NET session state enables you to store and retrieve values for a user as the user navigates ASP.NET pages in a Web application. In order to preserve server memory, ASP.NET implements a rolling timeout mechanism which discards the session information for a user if no request is seen within the timeout period (default 20 minutes which is reset with each request).

You would also have to setup session timeout in IIS in addition to webconfig settings.

In IIS6 change the session timeout setting by going to:
'Configuration' Button -> 'Options' Tab -> Tick Enable Session state, increase value from default 20 mins to desired value

In IIS7 change the session timeout setting by going to:

Features View pane –> Application Development – >Sessions state

Don’t see Session state icon in IIS 7? Check this blog post

http://blogs.msdn.com/webdevtools/archive/2006/09/18/761206.aspx

Here are some other reasons for Session loss..

1.) IIS worker process restart or Application Pool recycle.(Check the System logs)

2.) Application Domain restart due to Antivirus scans or changes in Config files.

Please leave a comment.

 
<script type="text/javascript" language="javascript">
function CustomValidator1_ClientValidate(source,args)
{ 
var listbox = document.getElementById("<%=ListBox1.ClientID %>");
var total = 0;
var i=0;
for( i = 0; i < listbox.options.length; i++ )
{
 if (listbox.options[i].selected) 
  {
   total ++; 
    if (total >10) {
      args.IsValid = false;
      return;
  }
  } 
 } 
 args.IsValid = true; return;
}
</script>
 
<asp:ListBox ID="ListBox1" runat="server" SelectionMode="Multiple" Height="100%"
Width="100%"></asp:ListBox>
<asp:Button ID="Button3" runat="server" OnClick="Button1_Click" Text="Button" />
<asp:CustomValidator ID="CustomValidator1" runat="server" Display="Dynamic" ErrorMessage="Please select 10 items only."
ClientValidationFunction="CustomValidator1_ClientValidate" OnServerValidate="CustomValidator1_ServerValidate">
</asp:CustomValidator>

Code Behind:

protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args) 
{ 
  int count = 0; 
  for (int i = 0; i < ListBox1.Items.Count; i++) 
  { 
        if (ListBox1.Items[i].Selected) 
            count++; 
  } 
 args.IsValid = (count > 10) ? false : true; 
}