<!DOCTYPE html>
<html>
<head>
<style>
.TestStyle
      {
      font: 12pt verdana;
      font-weight:700;
      color:orange;
      }
</style>
</head>

<body>
<form runat="server">
<asp:Button id="Button" CssClass="TestStyle" Text="Submit" runat="server"/>
</form>
</body>
</html>