In VS2012 i am getting many messages, not errors, just messages like the following
Message 2 Validation (ASP.Net): Attribute 'placeholder' is not a valid attribute of element 'TextBox'.
Since my doctypes are html5, even though they are asp:Textbox, that attribute is valid. Why am I getting these messages? Is there a setting I need to change in VS to remove these as they are nothing but annoying to look at.
PS and yes i have the <!DOCTYPE html > tag