Parses PDBs from http://referencesource.microsoft.com/netframework.aspx and extracts source files to findable locations

SourceParser.cs

//const string OriginalPath = @"C:\Users\SSL\Development\RefSrc\Source";
const string PDBPath = @"C:\Users\SSL\Development\Symbols\RefSrc\Symbols";
const string OriginalPath = @"C:\Users\SSL\Development\Symbols\RefSrc\Source\.NET 4.5\4.6.0.0";
const string TargetPath = @"C:\Users\SSL\Development\3rd-Party Source\Microsoft\.Net 4.5.1";
const string ErrorLog = TargetPath + @"\Errors.log";
static readonly Regex GoodLine = new Regex(@"^[a-zA-Z0-9\\:]{5}");
void Main() {
	var pdbs =	from file in Directory.EnumerateFiles(PDBPath, "*.pdb", SearchOption.AllDirectories)
				group file by Path.GetFileName(file) into g
				select g.OrderByDescending(p => new FileInfo(p).Length).First();

	var basePath = Path.Combine(OriginalPath, @"net");
	foreach(var pdb in pdbs) {
		var assemblyName = Regex.Replace(Path.GetFileNameWithoutExtension(pdb), @"(^|\.)[a-z]", m => m.Value.ToUpper())
			.Replace("Durableinstancing", "DurableInstancing")
			.Replace("Presentationframework", "PresentationFramework")
			.Replace("Servicemodel", "ServiceModel");
		var assemblyTarget = Path.Combine(TargetPath, assemblyName);
		Directory.CreateDirectory(assemblyTarget);
		var log = Path.Combine(assemblyTarget, "Errors.log");

		foreach(var line in File.ReadLines(pdb)) {
			if (line.Length < 3 || line[0] == '\0' || line[1] != ':') continue;
			if (!GoodLine.IsMatch(line)) {
				Console.WriteLine(line);
				continue;
			}

			try {
				
//f:\dd\ndp\fx\src\SystemNet\Net\PeerToPeer\Cloud.cs*DEVDIV_TFS*/Dev10/Releases/RTMRel/ndp/fx/src/SystemNet/Net/PeerToPeer/Cloud.cs*1305376
//f:\dd\ndp\clr\src\BCL\System\ValueType.cs*DEVDIV_TFS2*/DevDiv/D11Rel/FX45RTMRel/ndp/clr/src/BCL/System/ValueType.cs*597531
				var segments = line.Split('*');
				var fileName = Path.GetFileName(segments[2]);
				var originalFile = Path.Combine(basePath, segments[0].Replace(@"f:\dd\ndp\", "").Replace(@"f:\dd\wpf\", ""), segments[3], fileName);

				var dir = Path.Combine(assemblyTarget, (GetNamespace(originalFile) ?? "Unknown").Replace('.', '\\'));
		
				Directory.CreateDirectory(dir);
				var target = Path.Combine(dir, fileName);
				if (!File.Exists(target))
					File.Copy(originalFile, target);
				else
					File.AppendAllText(log, "Existing file: " + target + "\t" + fileName + Environment.NewLine);
			} catch (Exception ex) {
				File.AppendAllText(log, @"

------------------------------------
------------------------------------

ERROR:
	PDB:	" + assemblyName + @"
	Line:	" + line + @"
Exception:
" + ex.ToString());
					}

		}
	}
}
static void CopyFlat() {  //Ignores assemblies
	foreach (var originalFile in Directory.EnumerateFiles(OriginalPath, "*", SearchOption.AllDirectories)) {
		var fileName = Path.GetFileName(originalFile);

		var dir = Path.Combine(TargetPath, (GetNamespace(originalFile) ?? "Unknown").Replace('.', '\\'));

		Directory.CreateDirectory(dir);
		var target = Path.Combine(dir, fileName);
		if (!File.Exists(target))
			File.Copy(originalFile, target);
		else
			File.AppendAllText(ErrorLog, "Existing file: " + target + "\t" + fileName + Environment.NewLine);
	}
}
static string FindLine(string file, Func<string, bool> matches)
{
	return File.ReadLines(file).FirstOrDefault(matches);
}
static string GetNamespace(string filePath) {

	var fileName = Path.GetFileName(filePath);
	switch (Path.GetExtension(filePath))
	{
		case ".vb": {
				var nsLine = FindLine(filePath, s => s.StartsWith("Namespace "));

				if (nsLine == null)
					return null;
				else 
					return nsLine.Substring("Namespace ".Length).Trim();
			}
			break;
		case ".cs": {
				var nsLine = FindLine(filePath, s => s.StartsWith("namespace "));

				if (nsLine == null)
					return null;
				else 
					return nsLine.Substring("namespace ".Length).Trim().TrimEnd('{',' ','\t').Trim();
				//var nsIndex = content.IndexOf(nsText);
				//if (nsIndex == -1)
				//{
				//    var nst = "namespace ";
				//    nsIndex = content.IndexOf(nst);
				//    if (nsIndex >= 0)
				//    {
				//        var ns = content.Substring(nsIndex + nst.Length, content.IndexOf(Environment.NewLine, nsIndex) - (nsIndex + nst.Length)).Replace("{", "").Trim();
				//        dir = Path.Combine(basePath, ns.Replace('.', '\\'));
				//    }
				//    else
				//        dir = Path.Combine(basePath, "Unknown");
				//}
				//else
				//{
				//    var ns = content.Substring(nsIndex + nsText.Length, content.IndexOf(Environment.NewLine, nsIndex + 2) - (nsIndex + nsText.Length)).Replace("{", "").Trim();
				//    dir = Path.Combine(basePath, ns.Replace('.', '\\'));
				//}
			} break;
	}
	return null;
}