/// <summary>
/// Gets a random mac address.
/// </summary>
/// <param name="prefix">The prefix.</param>
/// <param name="groupSplit">The group split.</param>
/// <returns>The random mac address.</returns>
public static string MacAddress(string prefix = null, char groupSplit = ':')
{
const int maxBufferLength = 6;
int prefixesLength = prefix == null ? 0 : prefix.Split(groupSplit).Length;
if (prefix != null && prefixesLength < maxBufferLength &&
!prefix.EndsWith(groupSplit.ToString(), StringComparison.CurrentCulture))
{
prefix += groupSplit;
}
var buffer = new byte[maxBufferLength - prefixesLength];
RandomNumber.NextBytes(buffer);
string result = string.Concat(buffer.Select(x => x.ToString("X2", CultureInfo.CurrentCulture) + groupSplit));
return(prefix + result.TrimEnd(groupSplit));
}
