EF+LINQ事物处理

using System; 
using System.Collections.Generic; 
using System.Data.Entity; 
using System.Data.SqlClient; 
using System.Linq; 
using System.Transactions; 
 
namespace TransactionsExamples 
{ 
    class TransactionsExample 
    { 
        static void StartOwnTransactionWithinContext() 
        { 
            using (var db= new dbEntitys()) 
            { 
                using (var dbContextTransaction = db.Database.BeginTransaction()) 
                { 
                    try 
                    { 
                    var query = context.Posts.Where(p => p.Blog.Rating >= 5); 
                        foreach (var post in query) 
                        { 
                            post.Title += "[Cool Blog]"; 
                        } 
 
                        context.SaveChanges(); 
 
                        dbContextTransaction.Commit(); 
                    } 
                    catch (Exception) 
                    { 
                        dbContextTransaction.Rollback(); 
                    } 
                } 
            } 
        } 
    } 
}