var article = context.Articles.FirstOrDefault(p => p.ArticleId == ArticleId);
var article = context.Articles.FirstOrDefault(p => p.ArticleId == ArticleId).Select(p => p.CountViews);
int countViews = article++;
context.Database.ExecuteSqlCommand("UPDATE dbo.Articles SET CountViews = {0} WHERE ArticleId = {1}", countViews , ArticleId);