This is what i used and worked
try it
Dim md5 As MD5 = System.Security.Cryptography.MD5.Create()
Dim inputBytes As Byte() = System.Text.Encoding.ASCII.GetBytes("1234567890123475e8dd316726b0335")
Dim hash As Byte() = md5.ComputeHash(inputBytes)
Dim sb As New StringBuilder()
For i As Integer = 0 To hash.Length - 1
sb.Append(hash(i).ToString("x2"))
Next
TextBox1.Text = sb.ToString
Hope i helped