can i declare variable in controller scope in MVC 5

Question

Hello All,

 

Can i declare a variable in controller scope in Asp.net Mvc5 application or not?

 For Example:

 

public class EmloyeeController : Controller

{

private readonly IEmployee _employee;

 

public EmployeeController(IEmployee emp){

{

_employee=emp; 

} 

 

}

 

this line gives error that "Method must have return type" where I  have declare a private variable of type IEmployee.