public class Student {
public string Name { get; set; }
public string Sex { get; set; }
public string Age { get; set; }
}
public class Classinfo
{
public string Subject { get; set; }
public int Score { get; set; }
}

Student stu = new Student() { Name="张三",Sex="男",Age=""};

Classinfo cla = new Classinfo() { Subject="语文",Score=};

--情况1

string msg = "学生：[Student.Name]，[Student.Sex]，[Student.Age]岁。课程得分：[Classinfo.Subject]：[Classinfo.Score].";

---处理后结果输出

学生：张三，男，18岁。课程得分：语文：.

--情况2

string msg = "学生：[Student.Name]，[Student.Age]岁。课程得分：[Classinfo.Subject]：[Classinfo.Score].";

---处理后结果输出

学生：张三，18岁。课程得分：语文：.

--情况2

string msg = "[Student.Age]岁的[Student.Name]的[Classinfo.Subject]成绩：[Classinfo.Score].";

---处理后结果输出

18岁的张三的语文成绩：.

Student stu = new Student() { Name="张三",Sex="男",Age=""};

Classinfo cla = new Classinfo() { Subject="语文",Score=};

object[] sources = new object[] { stu,cla };

string msg = "学生：[Student.Name]，[Student.Sex]，[Student.Age]岁。课程得分：[Classinfo.Subject]：[Classinfo.Score].";

 foreach (var source in sources)

 {

   if (source == null)

       continue;

   msg = MessageBodyFactory.GetMessageBody(source, msg);

 }
//msg中可以随意修改。。

string msg = "学生：[Student.Name]，[Student.Sex]岁。课程得分：[Classinfo.Subject]：[Classinfo.Score].";
string msg = "[Student.Age]岁的[Student.Name]的[Classinfo.Subject]成绩：[Classinfo.Score].";