In this article I will explain with an example, how to download CSV file from URL in Windows Forms (WinForms) Application using C# and VB.Net.
In this Windows Forms application, the CSV file will be downloaded from the URL using WebClient class and then will be saved in a Folder (Directory) using C# and VB.Net.
 
 

CSV File URL

The following CSV file will be used in this article.
https://raw.githubusercontent.com/aspsnippets/test/master/Sample.csv
Download CSV File from URL in C# and VB.Net
 
 

Form Design

Following is the Form.
Download CSV File from URL in C# and VB.Net
 
 

Namespaces

You will need to import the following namespace.
C#
using System.Net;
 
VB.Net
Imports System.Net
 
 

Downloading CSV File from URL

Inside the Form Load event handler, the CSV file is downloaded from the URL using DownloadFile method of the WebClient class.

DownloadFile method

It accepts the following two parameters:
address – The URL of the file to be downloaded.
fileName – Path of the Folder (Directory) where the file will be downloaded.
C#
protected void Form_Load(object sender, EventArgs e)
{
    ServicePointManager.Expect100Continue = true;
    ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
    WebClient webClient = new WebClient();
    webClient.DownloadFile("https://raw.githubusercontent.com/aspsnippets/test/master/Sample.csv", @"D:\Files\Customers.csv");
}
 
VB.Net
Protected Sub Form_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ServicePointManager.Expect100Continue = True
    ServicePointManager.SecurityProtocol = CType(3072, SecurityProtocolType)
    Dim webClient As WebClient = New WebClient()
    webClient.DownloadFile("https://raw.githubusercontent.com/aspsnippets/test/master/Sample.csv", "D:\Files\Customers.csv")
End Sub
 
 

Screenshot

The downloaded CSV file

Download CSV File from URL in C# and VB.Net
 
 

Downloads

Download Code