c# - How do I ensure my website or web app based on html works on all browsers properly -

I am thinking that in one way or the settings I need to do in the HTML file so that my asp.net website / html Based website works properly with all lengths (IE / Firefox / Opera ... etc) with the correct length / height dimensions .... What settings and where do I need to do this?

There is really no way to check all browser compatibilities ... < P> The main problem with this is that each browser uses its own diversity of CSS3 standards Lizards and webkit browsers seem quite consistent, but IE usually throws a wrench between gears in particular versions.

In all honesty, you are doing the best that you comply with the standards and browser engine specific example, if you are setting a background and you want a css style shield, You may need to do something like this:

  .gradient-bg {background: #inced; Background: -Mo-linear-gradient (top, # half year 0%, # febe 100%); Background: -WebKit-Gradient (linear, left, left bottom, color-stop (0%, # acced), color-stop (100%, #phifif)); Background: -webkit-linear-shield (top, # half year 0%, #phiffe 100%); Background: -O linear shield (top, # half-year 0%, #phiffe 100%); Background: -MMS-linear-gradient (top, # half year 0%, #phiffe 100%); Background: Linear-gradient (top, # real 0%, # feiff 100%); Filters: Preceded by: DXimage TransformsForm Microsoft.Gridient (Startcollstrastrait = '#Assged', Endocrostrostrat = '# Feifef', Gradient Type = 0); }   
 This ensures that we address a legacy browser that does not support any gradient changes, as well as support different versions, but different ways From (i.e. - MS-Linear-Slope versus. Filer: Prozed: DXImageTransform.Microsoft.gradient or -webkit-gradient vs. webkit-linear-gradient). Also note that any CSS attributes recognized by the browser are not ignored only and the rendering of the browser comes on the version of the next accredited genre.  
 This is becoming more and more industry standard that you develop for CSS3 and unconventional browser presented unrestrictedly.  
 The only way to be sure is to check it in every supported browser and see it yourself, however, IE comes with the developer tool, which allows you to view your content. As in the previous version of IE, this can be quite different from the actual (non-compatibility view) version.  
 The easiest way to IEEE to render the same (or its closest) to different versions is to compatibility through a meta tag. (Presents in IE7 mode and supports DOCTYPE instructions).  
 Long story short ... WebKit & amp; Gecko compatible, so you stumble upon them as IE issues addresses issues. Since IE is not the only browser in other 2 categories, you should be good.