在OOP中使用静态变量的正确方法是什么?

我在做员工管理系统。每个员工属于一个部门，当员工登录系统时，我将UserId和DepartmentId存储在我的类中，如下所示

internal static class MyStaticData
{
    internal static Guid UserId { get; set; }
    internal static Guid DepartmentId { get; set; }
}

当用户去创建休假申请页面并点击保存按钮时，我需要发送UserId和departmentd来存储在数据库中，那么在

之间发送UserId和departmentd到此页面的正确方法是什么?

// Create instance property inside the class and assign it when create new object.
public class LeavePage
{
    public Guid UserId { get; set; }
    public Guid DepartmentId { get; set; }
}
var leavePage = new LeavePage { UserId = MyStaticData.UserId, DepartmentId = MyStaticData.DepartmentId };

或

// Don't have instance property inside the class but use MyStaticData directly
public class LeavePage
{
    public void Save()
    {
        Db.Save(data, ..., MySataicData.UserId, MyStaticData.DepartmentId);
    }
}

我不确定哪一个更好(少耦合)或它有更好的方法来做到这一点?

public class User
{
    public Guid Id { get; set; }
    public Guid DepartmentId { get; set; }
}
public static class SessionContext
{
    public static User CurrentUser { get; set; }
}