public static void Main()
var inputGUID = "{E3B8506E-8560-40F1-AE2E-29E61D266E2C}";
inputGUID = inputGUID.ToLower();
inputGUID = inputGUID.Replace("-", "");
inputGUID = inputGUID.Replace("{", "");
inputGUID = inputGUID.Replace("}", "");
var guid = new Guid(inputGUID);
var encoded = Convert.ToBase64String(guid.ToByteArray());
Console.WriteLine(encoded);
Console.WriteLine("db.getCollection('FormData').find({FormID:BinData(3,\""+encoded+"\")})");
Console.WriteLine("Invalid Input String");
Console.WriteLine(ex.Message);