当您禁用延迟加载时，仍然可以延迟加载相关实体，但必须使用显式调用完成.
与延迟加载不同，在运行查询时不存在歧义或混淆的可能性.
为此，请使用Load关于相关实体的条目的方法.
对于一对多关系，请在Collection上调用Load方法.
对于一对一的关系，请在参考上调用Load方法.
让我们看一下下面的示例，其中禁用延迟加载，然后检索名字为Ali的学生.
然后在控制台上写入学生信息.如果您查看代码，也会编写注册信息，但是尚未加载注册实体，因此不会执行foreach循环.
此后显式加载注册实体学生信息和注册信息将写在控制台窗口上.
class Program {
static void Main(string[] args) {
using (var context = new UniContextEntities()) {
context.Configuration.LazyLoadingEnabled = false;
var student = (from s in context.Students where s.FirstMidName ==
"Ali" select s).FirstOrDefault<Student>();
string name = student.FirstMidName + " " + student.LastName;
Console.WriteLine("ID: {0}, Name: {1}", student.ID, name);
foreach (var enrollment in student.Enrollments) {
Console.WriteLine("Enrollment ID: {0}, Course ID: {1}",
enrollment.EnrollmentID, enrollment.CourseID);
}
Console.WriteLine();
Console.WriteLine("Explicitly loaded Enrollments");
Console.WriteLine();
context.Entry(student).Collection(s ⇒ s.Enrollments).Load();
Console.WriteLine("ID: {0}, Name: {1}", student.ID, name);
foreach (var enrollment in student.Enrollments) {
Console.WriteLine("Enrollment ID: {0}, Course ID: {1}",
enrollment.EnrollmentID, enrollment.CourseID);
}
Console.ReadKey();
}
}
}执行上述示例时，您将收到以下输出.首先显示学生信息，并在显式加载注册实体后，显示学生及其相关注册信息.
ID: 1, Name: Ali Alexander Explicitly loaded Enrollments ID: 1, Name: Ali Alexander Enrollment ID: 1, Course ID: 1050 Enrollment ID: 2, Course ID: 4022 Enrollment ID: 3, Course ID: 4041
我们建议您逐步执行上述示例，以便更好地理解.
