Pass output parameters in a template object in Dapper

I have stored procedures with input and output parameters. I have separate classes for input and output classes. So, I want to create Dynamic Parameters using template objects instead of adding each property.

For Eg:

public class StudentInput {
 public StudentInput() {
   this.StudentId = 1;
 }
 public int StudentId {get; set}
}

public class StudentOutput {
 public string StudentName {get; set;}
 public string FavSubject {get; set;}
 public int Grade {get; set;}
 public int YearOfJoining {get; set;}
}

I have a stored procedure [SP_GetStudentData] that takes StudentId as input and returns StudentName, FavSubject, Grade and YearOfJoining.

Using Dapper, I wrote the following code.

DynamicParameters ip = new DynamicParameters(new StudentInput());
DynamicParameters op = new DynamicParameters(new StudentOutput());

ip.AddDynamicParameters(op); 

// Here is the question. How do I tell Dapper that op is a output parameters object? How do I add ParameterDirection output to each of the properties in this object?

SqlMapper.ExecuteSP(connection, SP_GetStudentData, ip, CommandType.StoredProcedure)