if statement in c# struct

public struct course { public long Cid; public String CourseName; public int CourseCapacity; public long cid { get { return Cid; } set { Cid = value; } } public String courseName { get { return CourseName; } set { CourseName = value; } } public int courseCapacity { get { return CourseCapacity; } set { if (value > 20 && value <= 50) { CourseCapacity = value; } else if (value <= 20) { CourseCapacity = 20; } else if (value > 50) { CourseCapacity = 50; } } } }; class SaAssign { static void Main(string[] args) { course c = new course(); c.Cid = 926; c.courseName = "career"; c.CourseCapacity = 100; Console.Write("Course Details: \n \n" + c.Cid + "\n" + c.CourseName + "\n" + c.CourseCapacity + "\n"); Console.ReadLine(); }