Unable to access or login failed for user to connect with Content Database of Sharepoint 2010

I came across an issue while connecting U2UCaml Builder with my site collection using Sharepoint 2010 object model and i got SQL Exception  unable to connect to SQL :database login failed for user to connect with Content Database etc...

I checked for my user rights and  it is in Site Collection  Admin as well as Farm Admin group then i tried accessing the database directly from SQL Management Studio , it says database can't be accessible

so i came to a solution with following power shell commands, i thought to share with all.

1. Open your SharePoint 2010 Management Shell as an Administrator

2. Run the following script

  $app = Get-SPWebApplication -identity “yourwebappname”
  $app.GrantAccessToProcessIdentity(“domain\username”)

Unhandled exception occurred in the silverlight application sharepoint 2010

An unhandled exception occurred on the create page when trying to create new list  in SharePoint 2010 site.

It happens because Silverlight Application trying to connect to the WCF endpoints configured by the product for enabling Client Object Model, which gives error as security validation is set to Off for the Web Application

1. To set it to ON, Go To Central Admin -> Application Management ->Manage Web Applications

2. Select the appropriate web application -> General Settings -> enable the security settings