Hi anirudhp,

Refer below sample.

Refer below article and download the QRcoder dll.

Dynamically generate and display QR code Image in ASP.Net

Namespaces

C#

using QRCoder;
using System.IO;
using System.Drawing.Imaging;

VB.Net

Imports QRCoder
Imports System.IO
Imports System.Drawing.Imaging

Code

C#

private void btnGenerate_Click(object sender, EventArgs e)
{
    string code = txtCode.Text;
    QRCodeGenerator qrGenerator = new QRCodeGenerator();
    QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(code, QRCodeGenerator.ECCLevel.Q);
    Bitmap bitMap = qrCode.GetGraphic(5);

    using (MemoryStream ms = new MemoryStream())
    {
        bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
        pictureBox1.Image = bitMap;
        pictureBox1.Height = bitMap.Height;
        pictureBox1.Width = bitMap.Width;
    }

    int x1 = 0;
    int x2 = Math.Max(pictureBox1.Image.Width, pictureBox1.Image.Width);
    int y1 = 0;
    int y2 = Math.Max(pictureBox1.Image.Height, pictureBox1.Image.Height);
    Rectangle rect1 = new Rectangle(new Point(x1, y1), pictureBox1.Image.Size);
    PointF firstLocation = new PointF(30f, 125f);
    PointF secondLocation = new PointF(30f, 50f);
    using (Graphics graphics = Graphics.FromImage(bitMap))
    {
        using (Font arialFont = new Font("Arial", 12))
        {
            graphics.DrawString(code, arialFont, Brushes.Black, firstLocation);
            graphics.DrawImage(pictureBox1.Image, rect1);
        }
        bitMap.Save(@"C:\Users\anand\Desktop\Test.png", ImageFormat.Png);
    }
}

VB.Net

Private Sub btnGenerate_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
    Dim code As String = txtCode.Text
    Dim qrGenerator As QRCodeGenerator = New QRCodeGenerator()
    Dim qrCode As QRCodeGenerator.QRCode = qrGenerator.CreateQrCode(code, QRCodeGenerator.ECCLevel.Q)
    Dim bitMap As Bitmap = qrCode.GetGraphic(5)

    Using ms As MemoryStream = New MemoryStream()
        bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png)
        pictureBox1.Image = bitMap
        pictureBox1.Height = bitMap.Height
        pictureBox1.Width = bitMap.Width
    End Using

    Dim x1 As Integer = 0
    Dim x2 As Integer = Math.Max(pictureBox1.Image.Width, pictureBox1.Image.Width)
    Dim y1 As Integer = 0
    Dim y2 As Integer = Math.Max(pictureBox1.Image.Height, pictureBox1.Image.Height)
    Dim rect1 As Rectangle = New Rectangle(New Point(x1, y1), pictureBox1.Image.Size)
    Dim firstLocation As PointF = New PointF(30.0F, 125.0F)
    Dim secondLocation As PointF = New PointF(30.0F, 50.0F)

    Using graphics As Graphics = graphics.FromImage(bitMap)

        Using arialFont As Font = New Font("Arial", 12)
            graphics.DrawString(code, arialFont, Brushes.Black, firstLocation)
            graphics.DrawImage(pictureBox1.Image, rect1)
        End Using

        bitMap.Save("C:\Users\anand\Desktop\Test.png", ImageFormat.Png)
    End Using
End Sub

Screenshot