Most Useful Attributes

Question

I know that attributes are extremely useful. There are some predefined ones such as [Browsable(false)] which allows you to hide properties in the properties tab. Here is a good question explaining attributes: What are attributes in .NET?

What are the predefined attributes (and their namespace) you actually use in your projects?

Answer 1

[DebuggerDisplay] can be really helpful to quickly see customized output of a Type when you mouse over the instance of the Type during debugging. example:

[DebuggerDisplay("FirstName={FirstName}, LastName={LastName}")]
class Customer
{
    public string FirstName;
    public string LastName;
}

This is how it should look in the debugger:

Also, it is worth mentioning that [WebMethod] attribute with CacheDuration property set can avoid unnecessary execution of the web service method.