Converting a byte to a binary string in c#

Question

In c# I am converting a byte to binary, the actual answer is 00111111 but the result being given is 111111. Now I really

Answer 1

public static string ByteArrayToString(byte[] ba)
{
    StringBuilder hex = new StringBuilder(ba.Length * 2);
    foreach (byte b in ba)
        hex.AppendFormat("{0:x2}", b);
    return hex.ToString();
}