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="18"};
Classinfo cla = new Classinfo() { Subject="语文",Score=89};

--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：89.

--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：89.

--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：89.

Student stu = new Student() { Name="张三",Sex="男",Age="18"};
Classinfo cla = new Classinfo() { Subject="语文",Score=89};

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。。