block ui

http://www.ajaxload.info/ (to generate images)

http://jquery.malsup.com/block/#download

$.blockUI({ message: '<img src="images/loading.gif" />',
                css: {
                    border: 'none',
                    padding: '16px',
                    backgroundColor: 'transparent',
                    '-webkit-border-radius': '10px',
                    '-moz-border-radius': '10px',
                    opacity: .5,
                    color: '#fff'
                }
            });


 $.unblockUI();

To show html code and .cs code on browser

http://www.manoli.net/csharpformat/format.aspx