What is the use of Private Constructor?

Insert,Update and Delete using Entity Framework

Hello Guys,

Insert update delete using Entity framework. Here is very nice Explanation.

ajax pro is not working with .Net Framework 4.0 and visual studio 2013

If you guys are converting from .net2.0 to 4.0 and visual studio 2013 then you may experience that your ajax pro will not work.

Ajax pro is work with classic managed pipeline mode.

In visual studio 2013 there is a facility to change managed pipeline mode via website Property window.

By default it is integrated for me.

So i change it to Classic and Ajax pro is working.

Potentially dangerous Request.Form value was detected

Today i was stucked in one issue after converting my website from .net2.0 to 4.0.

In .net2.0 page is working fine with ValidateRequest="false" but after converting to 4.0 it's throwing error

Sys.WebForms.PageRequestManager.prototype._endPostBack  ScriptResource.axd
 Sys.WebForms.PageRequestManagerServerErrorException:An unknown error occurred while processing the request on the server. The status code returned from the server was: 500

I tried different way to solve the issue but no luck.at the end i tried to remove ValidateRequest="false" attribute from page and then i got actual error which is that "Potentially dangerous Request.Form value was detected"

It was because i am storing some xml values in hidden field.but the strange in .net2.0 it was working fine then what is the issue in 4.0.

I think in .net4.0 Microsoft has change  some logic of validating request of web page.

So currently i have 2 solution to solve the issue.

1. Change the code and remove xml things from hidden variable.
2. I can validate page request as per .net framework 2.0

So Solution no 2 is better for me.

I have added following attribute to web.config

<httpRuntime requestValidationMode="2.0"/>