QR Code Generator
This really really simple Windows Desktop App takes the link you enter and creates a QR Code in your clipboard that you can then use elsewhere.

The App itself is literally just a few lines – feel free to recreate it yourself if you would prefer that!
This App uses the QRCoder Open Source library to generate a QRCode and then paste it into your clipboard.
Main Window XAML:
<Window x:Class="QRCodeGen.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:QRCodeGen"
mc:Ignorable="d"
Title="QR Code Generator" Height="122.03" Width="800" ResizeMode="NoResize">
<Grid Background="#FF210058">
<Button x:Name="Generate_Bitmap" Content="Copy to clipboard" HorizontalAlignment="Left" Margin="607,38,0,0" VerticalAlignment="Top" Width="151" Click="Button_Click" Height="23"/>
<TextBox x:Name="QRTextbox" HorizontalAlignment="Left" Height="23" Margin="29,38,0,0" TextWrapping="Wrap" Text="https://www.google.com" VerticalAlignment="Top" Width="503"/>
<Label Content="Put your link here:" HorizontalAlignment="Left" Height="26" Margin="30,12,0,0" VerticalAlignment="Top" Width="361" Foreground="White"/>
</Grid>
</Window>
Code for Button:
private void Button_Click(object sender, RoutedEventArgs e)
{
QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeData qrCodeData = qrGenerator.CreateQrCode(QRTextbox.Text, QRCodeGenerator.ECCLevel.Q);
QRCode qrCode = new QRCode(qrCodeData);
Bitmap qrCodeImage = qrCode.GetGraphic(30);
System.Windows.Forms.Clipboard.Clear();
System.Windows.Forms.Clipboard.SetDataObject(qrCodeImage, true);
}