GetRelativePath获取相对路径

public static string GetRelativePath(string baseDirPath, string subFullPath)
{
// ForceBasePath to a path
if (!baseDirPath.EndsWith("\\"))
baseDirPath += "\\";
var baseUri = new Uri(baseDirPath);
var fullUri = new Uri(subFullPath);
var relativeUri = baseUri.MakeRelativeUri(fullUri);
// Uri's use forward slashes so convert back to backward slashes
return relativeUri.ToString().Replace("/", "\\");
}