Checks an attribute to ensure that it can be rendered in the opening tag of a <form> markup element.
Assembly: System.Web (in System.Web.dll)
The HtmlTextWriter class implementation of the method returns true for all attributes. Override the to limit the attributes that can be rendered in the opening tag of a <form> element.Notes to Inheritors
Override the method to return true only for those attributes that can be included in the <form> element of the markup for which the class derived from the HtmlTextWriter class is intended.