Screenshot.NET

Simple screenshot library for .NET. Allows selection and capture of screen region, similar to Snipping Tool.

Requirements

• .NET Framework 4.6.2+, .NET 6+, or .NET 8+
• Windows only (uses WPF and System.Drawing)

Installation

dotnet add package GI.Screenshot

Or via Package Manager Console:

PM> Install-Package GI.Screenshot

Supported Frameworks

The library targets multiple frameworks:

• .NET Framework 4.6.2 (net462)
• .NET 6.0 Windows (net6.0-windows)
• .NET 8.0 Windows (net8.0-windows)

NuGet will automatically select the appropriate version for your project.

Usage

using GI.Screenshot;

// allow user to select and capture screen region
var image = Screenshot.CaptureRegion();

// customize the selection UI
var options = new ScreenshotOptions
{
    BackgroundOpacity = 0.5,
    SelectionRectangleBorderBrush = Brushes.Red
};
var image = Screenshot.CaptureRegion(options);

// get a screenshot of given region
var image = Screenshot.CaptureRegion(rect);

// get a screenshot of all screens
var image = Screenshot.CaptureAllScreens();

The returned BitmapSource can be used directly in WPF or saved to disk.

Multiple monitors with different scale factors

The application must enable per-monitor DPI awareness in order for the region selection to work properly on a multi-monitor setup where not all monitors use the same scale factor.

It is recommended to set this in the application manifest:

<?xml version="1.0" encoding="utf-8"?>

<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">

  <application xmlns="urn:schemas-microsoft-com:asm.v3">
    <windowsSettings>
      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">True/PM</dpiAware>
      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2, PerMonitor</dpiAwareness>
    </windowsSettings>
  </application>

</assembly>

Building

Build the library:

dotnet build Screenshot.sln

Create NuGet package:

dotnet pack Screenshot/Screenshot.csproj -c Release -o Releases

License

MIT License - see LICENSE file for details