How Convert C# signature routine to vb.net

See more:

VB

security

C#5.0

I am working on a project that needs to create a signature. I have a C# module that works and I am trying to create a vb.net sample but it is not generating the same value and I am not sure what I am doing wrong.

All help is welcome.

Values:

key= "dab01234dab01234"
message ="GET\napi-clientid:06f68777d07e4d2994a657834662bc345\napi-version:1\ntimestamp:4/06/2015 11:04am\ntops-clientid:dab\ncommunity"

C# Routine
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Web.Http;

private static string GetSignature(string key, string message) {
var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(key));
return Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(message)));
}
}
Value Returned by C#
signature "G2LWmwWsDkTbOLahA8/EykgkGIakk5kOl9ZNXrOuKAY=" string

VB.net Routine
Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Net.Http
Imports System.Net.Http.Headers
Imports System.Security.Cryptography
Imports System.Text
Imports System.Threading.Tasks
Imports System.Web.Http

Private Function GetSignature(ByVal key As String, ByVal message As String) As String

Dim hmac As HMACSHA256 = New HMACSHA256(Encoding.UTF8.GetBytes(key))
Return Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(message)))

End Function

Value returned by VB
sSignature "qWrq4fx1U/JYKBI+z6yIw10+oH3x3nHJ4/JTHGIlIHA=" String