How to set Thousands Separator in the NumericUpDown in C#?

In Windows Forms, NumericUpDown control is used to provide a Windows spin box or an up-down control which displays the numeric values. Or in other words, NumericUpDown control provides an interface which moves using up and down arrow and holds some pre-defined numeric value. In NumericUpDown control, you can set the thousands separator in the up-down control which will display in the output using ThousandsSeparator Property.
If the value of this property is set to true, then thousands separator will display. And if the value of this property is set to false, then thousands separator will not display on the screen. The default value of this property is false. You can set this property in two different ways:

1. Design-Time: It is the easiest way to set thousands separator in the NumericUpDown 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 NumericUpDown control from the toolbox on the form as shown in the below image:

  

• Step 3: After drag and drop you will go to the properties of the NumericUpDown and set thousands separator in the NumericUpDown as shown in the below image:

  

  Output:
  

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

public bool ThousandsSeparator { get; set; }

The value of this property is of System.Boolean type, either true or false. The following steps show how to set thousands of separator in the NumericUpDown dynamically:

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

  // Creating a NumericUpDown
  NumericUpDown n = new NumericUpDown();
  

• Step 2: After creating NumericUpDown, set the ThousandsSeparator property of the NumericUpDown provided by the NumericUpDown class.

  // Setting ThousandsSeparator
  n.ThousandsSeparator = true;
  

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

  // Adding NumericUpDown
  // control on the form
  this.Controls.Add(n);
  

  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 WindowsFormsApp44 {
  
  public partial class Form1 : Form {
  
      public Form1()
      {
          InitializeComponent();
      }
  
      private void Form1_Load(object sender, EventArgs e)
      {
          // Creating and setting the
          // properties of the labels
          Label l1 = new Label();
          l1.Location = new Point(348, 61);
          l1.Size = new Size(215, 25);
          l1.Text = "Example";
          l1.Font = new Font("Bodoni MT", 16);
          this.Controls.Add(l1);
  
          Label l2 = new Label();
          l2.Location = new Point(242, 136);
          l2.Size = new Size(103, 20);
          l2.Text = "Select value:";
          l2.Font = new Font("Bodoni MT", 12);
          this.Controls.Add(l2);
  
          // Creating and setting the
          // properties of NumericUpDown
          NumericUpDown n = new NumericUpDown();
          n.Location = new Point(386, 130);
          n.Size = new Size(126, 26);
          n.Font = new Font("Bodoni MT", 12);
          n.Minimum = 1800;
          n.Maximum = 3000;
          n.Increment = 1;
          n.ThousandsSeparator = true;
  
          // Adding this control
          // to the form
          this.Controls.Add(n);
      }
  }
  }

  Output: