如何将json键映射到类属性

我有一个JSON响应如下

{
  "Robert": [
  {
    "id": "123",
    "class": "7th",
    "lastname": "johnson"
   }
 ],
 "William": [
  {
    "id": "124",
    "class": "7th",
    "lastname": "parker"
  }
 ]
}

我想将其映射到C＃类。 使用在线转换器我得到以下结构

public class Robert {
 public string id { get; set; }
 public string class { get; set; }
 public string lastname { get; set; }

}
public class William {
 public string id { get; set; }
 public string class { get; set; }
 public string lastname { get; set; }

}
public class Application {
 public IList<Robert> Robert { get; set; }
 public IList<William> William { get; set; }

}

取而代之的是，我想将学生姓名映射为类属性之一。

public class Student{
 public string Name{ get; set; } //Robert is mapped to this 
 public string id { get; set; }
 public string class { get; set; }
 public string lastname { get; set; }

}

我怎样才能做到这一点 ？