With the new release of .NET framework
micosoft enhanced the functionlity of some web form server controls to supports
the feature of new HTML 5. Now the developer can take the benefits of HTML 5
features with the server controls in ASP.NET 4.5.
Here I will discuss the new improvements in server controls.
The TextMode property: The TextBox control support the new HTML5 input
types like email, datetime, and etc.
Learn more from here.
http://www.c-sharpcorner.com/UploadFile/99bb20/upload-multiple-files-using-fileupload-control-in-Asp-Net-4/
The FileUpload control: Now supports multiple file uploads feature of
HTML5.
Learn more from here.
http://www.c-sharpcorner.com/Blogs/11411/textboxs-textmode-property-in-Asp-Net-4-5.aspx
Validator controls: Now support validating HTML5 input elements.
The UpdatePanel control: It has been fixed to support posting HTML5 input
fields.