Obtains all the file paths from the provided paths - if a directory is a path then expand it and obtain it's files

ExpandPaths.cs

public IEnumerable<string> ExpandPaths(IEnumerable<string> paths)
{
	var expandedPaths = new List<string>();
	foreach (var p in paths)
	{
		if (Directory.Exists(p))
		{
			expandedPaths.AddRange(Directory.GetFiles(p));
			expandedPaths.AddRange(ExpandPaths(Directory.GetDirectories(p)));
		}
		else if (File.Exists(p)) expandedPaths.Add(p);
	}
	return expandedPaths;
}