如何将文件的一部分读入对象

我有一个文件，我想扫描该文件并将其放入自定义对象中。

该文件如下所示：

[Student]
Name=John
LastName=Doe 
Username=user1
Password=pass1

[Teacher]
Name=Jane
LastName=Doe
Username=user2
Password=pass2

[Manager]
Name=Jason
LastName=Doe
Username=user3
Password=pass3

我有一个Profile看起来像这样的课：

public class Profile
{
    public string studentName       { get; set; }
    public string studentLastName   { get; set; }
    public string studentUsername   { get; set; }
    public string studentPassword   { get; set; }
    public string teacherName       { get; set; }
    public string teacherLastName   { get; set; }
    public string teacherUsername   { get; set; }
    public string teacherPassword   { get; set; }
}

因此，我只需要让学生和老师进入个人资料对象即可。这是我的开始方式：

public Profile readFile(string filename)
{
     var profile = new Profile();

     using (StreamReader sr = new StreamReader(filename))
     {
         while (!sr.EndOfStream)
         {
             String line = sr.ReadLine();
             if (line != null && line.Contains("Student"))
             {
                 // and I am stuck here, not sure how to find 
                 // the next lines, so i can take the values
                 // and put them in the profile 
              }

              if (line != null && line.Contains("Teacher"))
              {
                 // and I am stuck here, not sure how to find 
                 // the next lines, so i can take the values
                 // and put them in the profile 
              }
          }
      }
  }