Reading Portable PDBs with System.Reflection.Metadata

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Reading Embedded Portable PDBs

This example shows how to read an embedded portable PDB file using the System.Reflection.Metadata classes.

Code.cs

void Main()
{
	var peFilePath = @"C:\path\file.dll";

	using var stream = File.OpenRead(peFilePath);
	using var peReader = new PEReader(stream);

	var embeddedEntries = peReader.ReadDebugDirectory().Where(x => x.Type == DebugDirectoryEntryType.EmbeddedPortablePdb);
	var provider = peReader.ReadEmbeddedPortablePdbDebugDirectoryData(embeddedEntries.Single());
	var pdbReader = provider.GetMetadataReader();
	
	foreach (var methodDebugInfoHandle in pdbReader.MethodDebugInformation)
	{
		var debugInfo = pdbReader.GetMethodDebugInformation(methodDebugInfoHandle);
		foreach (var sequencePoint in debugInfo.GetSequencePoints())
		{
			var document = pdbReader.GetDocument(sequencePoint.Document);
			var fileName = GetDocumentName(pdbReader, document.Name);
		}
	}
}

public string GetDocumentName(MetadataReader reader, DocumentNameBlobHandle handle)
{
	var blobReader = reader.GetBlobReader(handle);
	var separator = (char) blobReader.ReadByte();
	string name = "";
	while (blobReader.Offset < blobReader.Length)
	{
		var partHandle = blobReader.ReadBlobHandle();
		if (name.Length != 0)
			name += separator;
		name += Encoding.ASCII.GetString(reader.GetBlobBytes(partHandle));
	}
	return name;
}