How to merge 2 objecttype list "list<classname>" into another list

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C#

i have model class look like

   public class Student
   {
       public string student_id{ get; set; }
       public string student_name{ get; set; }
       public string father_name{ get; set; }
   }
 public class StudentStatus
   {
       public string student_id{ get; set; }
       public string session{ get; set; }
       public string status{ get; set; }
   }
public class FinalList
   {
       public string student_id{ get; set; }
       public string student_name{ get; set; }
       public string father_name{ get; set; }
       public string session{ get; set; }
       public string status{ get; set; }
   }

and i have two List also

List<Student> std1=new List<Student>()
{
new Student{student_id="1",student_name="test1",father_name="father1"},
new Student{student_id="2",student_name="test2",father_name="father2"}
}

List<StudentStatus> std2=new List<StudentStatus>()
{
new Student{student_id="1",session="2021",status="Active"},
new Student{student_id="2",session="2022",status="InActive"}
}

now i want to merge the data of this two List into 3rd List. and my final list should be look like this:

List<FinalList> finallist=new List<FinalList>()
{
new Student{student_id="1",student_name="test1",father_name="father1",session="2021",status="Active"},
new Student{student_id="2",student_name="test2",father_name="father2",session="2022",status="InActive"}
}

any one suggest me the solution

What I have tried:

i google it but only find solution for string or int type list not classobject type list like this

1. firstList.AddRange (secondList);

2. var combined = list1.Concat(list2);

this solution does not work in my case