求高手将以下几句C#代码改为VB.NET语法，谢谢。急
Byte[]   hexstr2array(string   HexStr)
      {
  string   HEX   =   "0123456789ABCDEF ";
string   str   =   HexStr.ToUpper();
int   len   =   str.Length;
byte[]   RetByte   =   new   byte[len/2];
for(int   i=0;   i <len/2;   i++)
{
int   NumHigh   =   HEX.IndexOf(str[i*2]);
int   NumLow     =   HEX.IndexOf(str[i*2+1]);

RetByte[i]   =   Convert.ToByte(NumHigh*16+NumLow);
}
return   RetByte;
      }

------解决方案--------------------
转换工具
http://www.developerfusion.co.uk/utilities/convertcsharptovb.aspx