public abstract class KavandViewPage < TModel > : System.Web.Mvc.WebViewPage < TModel > {
          public override void Write(object value) {
              if (value != null) {
                  var html = value.ToString();
                  html = REGEX_TAGS.Replace(html, "> <");
                  html = REGEX_ALL.Replace(html, " ");
                  if (value is MvcHtmlString) value = new MvcHtmlString(html);
                  else value = html;
          }
          base.Write(value);
      }
    
      public override void WriteLiteral(object value) {
          if (value != null) {
              var html = value.ToString();
              html = REGEX_TAGS.Replace(html, "> <");
              html = REGEX_ALL.Replace(html, " ");
              if (value is MvcHtmlString) value = new MvcHtmlString(html);
              else value = html;
          }
          base.WriteLiteral(value);
      }
    
      private static readonly Regex REGEX_TAGS = new Regex(@">\s+<", RegexOptions.Compiled);
      private static readonly Regex REGEX_ALL = new Regex(@"\s+|\t\s+|\n\s+|\r\s+", RegexOptions.Compiled);
    
      }

<pages pageBaseType="Kavand.Web.Mvc.KavandViewPage"> <!-- pay attention to here -->
        <namespaces>
          <add namespace="System.Web.Mvc" />
          ....
        </namespaces>
      </pages>