Converting VB6 AES Rijndael Block Cipher to C# by Phil Fresle

I am converting a classic asp application to C#, and would like to be able to decrypt strings in c# that were originally encrypted in classic asp. the classic asp code is here, and the c# code is here. The problem that i am facing is that the signatures of the Encrypt and Decrypt methods in asp vs C# are different. here is my asp code for decrypting, which wraps the decrypt code.

Function AESDecrypt(sCypher)
 if sCypher <> "" then

    Dim bytIn()
    Dim bytOut
    Dim bytPassword()
    Dim lCount
    Dim lLength
    Dim sTemp
    Dim sPassword 
    sPassword = "My_Password"

    lLength = Len(sCypher)
    ReDim bytIn(lLength/2-1)
    For lCount = 0 To lLength/2-1
        bytIn(lCount) = CByte("&H" & Mid(sCypher,lCount*2+1,2))
    Next
    lLength = Len(sPassword)
    ReDim bytPassword(lLength-1)
    For lCount = 1 To lLength
        bytPassword(lCount-1) = CByte(AscB(Mid(sPassword,lCount,1)))
    Next

    bytOut = DecryptData(bytIn, bytPassword)  //' this is the problem child

    lLength = UBound(bytOut) + 1
    sTemp = ""
    For lCount = 0 To lLength - 1
        sTemp = sTemp & Chr(bytOut(lCount))
    Next

    AESDecrypt = sTemp
 End if 
End Function

However, in c# i am struggling to convert this function because the c# equivalent of DecryptData has more params

public static byte[] DecryptData(byte[] message, byte[] password, 
            byte[] initialisationVector, BlockSize blockSize, 
            KeySize keySize, EncryptionMode cryptMode)
        {...}

what values can i use for initialisationVector, blockSize, keySize, cryptMode so as to be able to decrypt the same way the classic asp code does.