Question

in .Net All Thing is Object but I have question. I write a method

public static MvcHtmlString ObjectTable(this HtmlHelper helper, 
                              ICollection<Object> objects, ICollection<string> header)

but I don’t add system.object and get error for add the namespace.
my question is:if all thing in .NET driven form object but why i should add the namespace?

Answer 1

The purpose of adding a using directive is simply to allow you to use names within that namespace without fully-qualifying them.

So you don’t have to add a using directive. You could write:

public static MvcHtmlString ObjectTable(this HtmlHelper helper, 
    ICollection<System.Object> objects, ICollection<string> header)

Or, as object is always an alias for System.Object, you could write:

public static MvcHtmlString ObjectTable(this HtmlHelper helper, 
    ICollection<object> objects, ICollection<string> header)

By the way, not everything derives from object…