XbfKit

for decompiling and compiling versioned XBF documents.

It supports XBF1 and XBF2/XBF2.1 documents, including the WUX and MUX dialects where applicable. The library exposes a semantic XAML object model so a document can be decompiled, edited, and recompiled.

Usage

> dotnet add package XbfKit

---

using XbfKit;

const string xaml = "<Grid xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" />";

using var xbf = new MemoryStream();
XbfCompiler.Compile(xaml, xbf, XbfVersion.Version2_1, XbfDialect.WUX);
xbf.Position = 0;

string decompiled = XbfDecompiler.Decompile(xbf, XbfDialect.WUX);

For a real file-to-file conversion, use the overload that accepts XbfCompilationOptions and the decompilation formatting options:

using XbfKit;

const string inputPath = "Page.xaml";
const string xbfPath = "Page.xbf";
const string outputPath = "Page.decompiled.xaml";

var compilationOptions = new XbfCompilationOptions
{
    Version = XbfVersion.Version2_1,
    Dialect = XbfDialect.WUX,
};

using (FileStream output = File.Create(xbfPath))
{
    XbfCompiler.Compile(File.ReadAllText(inputPath), output, compilationOptions);
}

var decompilationOptions = new XbfDecompilationOptions
{
    IndentSize = 2,
    IncludeConnectionIds = false,
    MaxAttributesPerLine = 2,
};

using FileStream input = File.OpenRead(xbfPath);
string decompiled = XbfDecompiler.Decompile(input, XbfDialect.WUX, decompilationOptions);
File.WriteAllText(outputPath, decompiled);

To access the validated in-memory representation directly, use the reader and writer in XbfKit.IO:

using XbfKit;
using XbfKit.IO;

XbfDocument document;
using (FileStream input = File.OpenRead("Page.xbf"))
{
    document = XbfDocumentReader.Read(input);
}

// Inspect or edit document.Metadata and document.Nodes here.

using FileStream output = File.Create("Page.copy.xbf");
XbfDocumentWriter.Write(document, output);

The supported format and dialect combinations are:

• XBF1 with XbfDialect.WUX
• XBF2 or XBF2.1 with XbfDialect.WUX or XbfDialect.MUX

WUX refers to Windows.UI.Xaml; MUX refers to Microsoft.UI.Xaml. The dialect must be supplied when decompiling because XBF2 does not retain enough information to distinguish those trusted framework schemas.