How to set a Check Box in the DateTimePicker in C#?

In Windows Form, the DateTimePicker control is used to select and display date/time with a specific format in your form. In DateTimePicker control, you are allowed to set a checkbox in the DateTimePicker using the ShowCheckBox Property.
If the value of this property is set to true, then a checkbox display in the DateTimePicker control, otherwise, false. When the checkbox is selected which means the date/time is updated and if the checkbox is unchecked, then you cannot update date/time. You can set this property in two different ways:

1. Design-Time: It is the easiest way to set a checkbox in the DateTimePicker as shown in the following steps:

• Step 1: Create a windows form as shown in the below image:
  Visual Studio -> File -> New -> Project -> WindowsFormApp
  
• Step 2: Next, drag and drop the DateTimePicker control from the toolbox to the form as shown in the below image:

  

• Step 3: After drag and drop you will go to the properties of the DateTimePicker and set a checkbox in the DateTimePicker as shown in the below image:

  

  Output:
  

Run-Time: It is a little bit trickier than the above method. In this method, you can set a checkbox in the DateTimePicker control programmatically with the help of given syntax:

public bool ShowCheckBox { get; set; }

The value of this property is of System.Boolean type, either true or false. The default value of this property is false. The following steps show how to set a checkbox in the DateTimePicker dynamically:

• Step 1: Create a DateTimePicker using the DateTimePicker() constructor is provided by the DateTimePicker class.

  // Creating a DateTimePicker
  DateTimePicker dt = new DateTimePicker();
  

• Step 2: After creating DateTimePicker, set the ShowCheckBox property of the DateTimePicker provided by the DateTimePicker class.

  // Setting the ShowCheckBox property
  dt.ShowCheckBox = true;
  

• Step 3: And last add this DateTimePicker control to the form using the following statement:

  // Adding this control to the form
  this.Controls.Add(dt);
  

Example:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp49 {

public partial class Form1 : Form {

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        // Creating and setting the
        // properties of the Label
        Label lab = new Label();
        lab.Location = new Point(183, 162);
        lab.Size = new Size(172, 20);
        lab.Text = "Select Date of Birth";
        lab.Font = new Font("Comic Sans MS", 12);

        // Adding this control to the form
        this.Controls.Add(lab);

        // Creating and setting the
        // properties of the DateTimePicker
        DateTimePicker dt = new DateTimePicker();
        dt.Location = new Point(360, 162);
        dt.Size = new Size(292, 26);
        dt.MaxDate = new DateTime(2500, 12, 20);
        ;
        dt.MinDate = new DateTime(1753, 1, 1);
        dt.Format = DateTimePickerFormat.Short;
        dt.Name = "MyPicker";
        dt.Font = new Font("Comic Sans MS", 12);
        dt.ShowCheckBox = true;

        // Adding this control to the form
        this.Controls.Add(dt);
    }
}
}

Output: