Problem with Operator '^' (xor) in C#

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C#

VB

Hello There.
I'm having a problem with the operator XOR in C# (Operator '^' cannot be applied to operands of type 'int' and 'double').
I don't know why I'm getting this error and I really hope that someone will be able to tell me what I'm doing wrong.

Note: I have made the code in VB and it works fine.

This is my code in C#:

string key, Pass2;
string car, code;
int i,j;
key = "&@/.^$#!%ü";
Pass2 = "";
j = 1;
for (i = 1; i <= Pass.Length; i +=2)
{
    car = Strings.Mid(Pass, i, 2);
    code = Strings.Mid(key, ((j - 1) % key.Length) + 1, 1);

    Pass2 = Pass2 + Strings.Chr(Strings.Asc(code) ^ Conversion.Val("&h" + car)); //here's where I'm getting the error 
    j = j + 1;
}
return Pass2;

And this one in VB:

Function DeCrypt(ByVal Pass As String) As String
    Dim Key As String, i As Integer, Pass2 As String
    Dim CAR As String, Code As String
    Dim j As Integer
    'Key = "%ü&/@#$A"
    Key = "&@/.^$#!%ü"
    Pass2 = ""
    j = 1
    For i = 1 To Len(Pass) Step 2
        CAR = Mid(Pass, i, 2)
        Code = Mid(Key, ((j - 1) Mod Len(Key)) + 1, 1)
        Pass2 = Pass2 & Chr(Asc(Code) Xor Val("&h" + CAR))
        j = j + 1
    Next i
    DeCrypt = Pass2
End Function