Set all textbox value null or empty at a time using foreach !!

It is very boring process to set null in all textbox field if you have a lot no of field ..
so you can apply following codes in your project ..
 
foreach (Control txt in this.Controls)
            {
                if (txt.GetType() == typeof(TextBox))
                    if (!string.IsNullOrEmpty(txt.Text))
                        txt.Text = null;
            }

Full Program ..

Designing window is  :

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 image_upload
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //OpenFileDialog obj = new OpenFileDialog();
           // obj.Filter =
        }

        private void button2_Click(object sender, EventArgs e)
        {
        
            foreach (Control txt in this.Controls)
            {
                if (txt.GetType() == typeof(TextBox))
                    if (!string.IsNullOrEmpty(txt.Text))
                        txt.Text = null;
            }
            textBox1.Focus();

        }
    }
}


If condition only to set null to text box if you want to reset all the field then remove this or comment
like
foreach (Control txt in this.Controls)
            {
               // if (txt.GetType() == typeof(TextBox))
                    if (!string.IsNullOrEmpty(txt.Text))
                        txt.Text = null;
            }
            textBox1.Focus();