what are the most used interfaces in C#? [closed]

问题

I tried searching for the most used built-in interfaces in C#, but couldn't find an article, so I thought we may recap here.

Let's use the following convention in the answers:

IinterfaceName1: for this

IinterfaceName2: for that

回答1:

The top two in my mind have to be ones with language support:

IEnumerable<T> (and IEnumerable): for use with foreach and LINQ
IDisposable: for resources requiring cleanup, used with using

Beyond that...

IComparable<T> and IComparer<T>: for generalized sorting
IEquatable<T> and IEqualityComparer<T>: for generalized equality
IList<T> and ICollection<T>: for mutable collections
IDictionary<T,K>: for lookup collections

回答2:

INotifyPropertyChange : For data binding to UI classes in WPF, winforms and silverlight

回答3:

IQueryable<T>: lets you execute requests against queriable data sources. For example

        IQueryable<Project> projects = db.Projects;
        var selectedItems = projects
            .Where(x => x.Workers.Count() > 10 && x.Status != 1)
            .ToArray();

In this example filtering would be done on SQL Server (in involves tricky mechanics with translating Expression x => x.Workers.Count() > 10 && x.Status != 1 to SQL statements) So no need to write custom SQL commands to use all might of data source.

Also can be used not only with SQL, you can query objects or anything else, just find implementation of IQueryable<T>

来源：https://stackoverflow.com/questions/4240438/what-are-the-most-used-interfaces-in-c

标签

interface