Get object values through RadioButton click

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C#

Here is the code to my application. I made the radio buttons part of the Employee class so that they are linked and when selected, the Employee attribues are available for modification purposes (also I plan to implement a lightweight db for persistence eventually) but I'm missing some logic.

I can get the radio buttons to populate the groupbox, and I have an event handler that populates the textboxes with the Employee's name and function when a Radio Button is clicked, but it always selects the last Employee created. I'm not sure how to navigate through the List<employee> to make sure the Radio Button clicked is associated to the Employee object.

Any help is appreciated. Thanks.

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace TaskManager.Forms {
    public partial class EmployeeForm : Form {

        int _id;
        int _y = -5;
        Employee _employee;
        List<Employee> emps = new List<Employee>();

        public EmployeeForm() {
            InitializeComponent();
        }
        public void EmpExitButton_Click(object sender, EventArgs e) {
            Close();
        }
        public void EmployeesGroupBox_Enter(object sender, EventArgs e) {

        }
        public void EmpAddButton_Click(object sender, EventArgs e)
        {
            _id += 1;
            _y += 20;

            _employee = new Employee(FNameBox.Text, LNameBox.Text, FunctionBox.Text);
            _employee.Id = _id;
            _employee.Rb.Click += new EventHandler(_rB_Click);
            _employee.Rb.Width = 185;
            _employee.Rb.Text = FNameBox.Text + " " + LNameBox.Text + ": " + FunctionBox.Text;
            _employee.Rb.Tag = _employee.Id;
            EmployeesGroupBox.Controls.Add(_employee.Rb);
            _employee.Rb.Location = new Point(5, _y);

            emps.Add(_employee);

            FNameBox.Clear();
            LNameBox.Clear();
            FunctionBox.Clear();
        }
        public void _rB_Click(object sender, EventArgs e) {

            //want to find Employee associated to clicked RadioButton            
            
            int x = 1;
            switch (_employee.Id)
            {
                case 1:
                    x = 1;
                    break;
                case 2:
                    x = 2;
                    break;
                case 3:
                    x = 3;
                    break;
                case 4:
                    x = 4;
                    break;
                default:
                    FNameBox.Text = "Unknown Employee";
                    LNameBox.Text = "Unknown Employee";
                    FunctionBox.Text = "Unknown Employee";
                    break;
            }
            
           //this causes an argument out of range exception. Not sure why.

            FNameBox.Text = emps[x].FName;
            LNameBox.Text = emps[x].LName;
            FunctionBox.Text = emps[x].Function;

            foreach(var Employee in emps) {
                _employee.Rb.Checked = false;
            }
        }
        public void EmpEditButton_Click(object sender, EventArgs e) {

        }
        public void FNameBox_TextChanged(object sender, EventArgs e) {
        }
        public void LNameBox_TextChanged(object sender, EventArgs e) {
        }
        public void FunctionBox_TextChanged(object sender, EventArgs e) {
        }
        private void EmpDeleteButton_Click(object sender, EventArgs e) {

        }
        private void FieldClearButton_Click(object sender, EventArgs e) {

            FNameBox.Text = "";
            LNameBox.Text = "";
            FunctionBox.Text = "";
        }
        private void EmpSaveButton_Click(object sender, EventArgs e) {

        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace TaskManager {
    public class Employee {
        public String FName { get; set; }
        public String LName { get; set; }
        public String Function { get; set; }
        public int Id { get; set; }
        public RadioButton Rb { get; set; }

        public Employee ( ) {
            Rb = new RadioButton();
            Rb.Width = 185;
        }

        public Employee(String first, String last, String func) {

            FName = first;
            LName = last;
            Function = func;
            Rb = new RadioButton();
            Rb.Width = 185;
        }
    }
}