/// <summary>
/// Convert SPN to a string.
/// </summary>
/// <returns>The SPN string.</returns>
public override string ToString()
{
int length = 0;
Win32Error err = SecurityNativeMethods.DsMakeSpn(ServiceClass, ServiceName, InstanceName,
(ushort)InstancePort, Referrer, ref length, null);
if (err == Win32Error.SUCCESS)
{
return(string.Empty);
}
if (err != Win32Error.ERROR_BUFFER_OVERFLOW)
{
throw new NtException(err.MapDosErrorToStatus());
}
StringBuilder builder = new StringBuilder(length);
SecurityNativeMethods.DsMakeSpn(ServiceClass, ServiceName, InstanceName,
(ushort)InstancePort, Referrer, ref length, builder).ToNtException();
return(builder.ToString());
}