c#之索引超出范围。必须为非负数且小于集合的大小。参数名称 : index

我使用网络平台来验证我的用户是否允许使用应用程序，但如果可能的话，我有一些错误请求帮助我，谢谢你的帮助，我的错误是:

2013-07-04 15:06:14 - NPMessage: DEBUG: Dispatching a RPCAuthenticateValidateTicketMessage 2013-07-04 15:06:14 - NPMessage: ERROR: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: startIndex at System.BitConverter.ToUInt64(Byte[] value, Int32 startIndex) at NPx.RPCAuthenticateValidateTicketMessage.ReadTicket(Byte[] bytes) at NPx.RPCAuthenticateValidateTicketMessage.Process(NPHandler client) at NPx.NPMessage.Process()

我的来源是:

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Net; 
using System.Text; 
using System.Threading; 
 
using NPx; 
 
namespace NPx 
{ 
 public partial class RPCAuthenticateValidateTicketMessage : NPRPCMessage<AuthenticateValidateTicketMessage> 
 { 
     public override void Process(NPHandler client) 
     { 
         var ipNum = (uint)IPAddress.NetworkToHostOrder(Message.clientIP); 
         var ip = new IPAddress(BitConverter.GetBytes(ipNum)); 
         var ticket = ReadTicket(Message.ticket); 
         var npid = Message.npid; 
 
         if (npid == 0) 
         { 
             npid = ticket.clientID; 
         } 
 
         var valid = false; 
         var groupID = 0; 
 
         if (ticket.version == 1) 
         { 
             if (client.NPID == (long)ticket.serverID) 
             { 
                 if (npid == ticket.clientID) 
                 { 
                     var remoteClient = NPSocket.GetClient((long)ticket.clientID); 
                     remoteClient.CurrentServer = client.NPID; 
 
                     if (remoteClient != null && !remoteClient.Unclean) 
                     { 
                         Log.Debug("Ticket auth: remote address " + remoteClient.Address.Address.ToString()); 
                         Log.Debug("Ticket auth: message address " + ip.ToString()); 
 
                         if (ipNum == 0 || remoteClient.Address.Address.Equals(ip)) 
                         { 
                             valid = true; 
 
                             groupID = remoteClient.GroupID; 
 
                             Log.Debug("Successfully authenticated a ticket for client " + remoteClient.NPID.ToString("x16")); 
                         } 
                         else 
                         { 
                             Log.Debug("Ticket auth: IP address didn't match."); 
                         } 
                     } 
                     else 
                     { 
                         Log.Debug("Ticket auth: no such client"); 
                     } 
                 } 
                 else 
                 { 
                     Log.Debug("Ticket auth: NPID didn't match."); 
                 } 
             } 
             else 
             { 
                 Log.Debug("Ticket auth: server NPID didn't match."); 
             } 
         } 
         else 
         { 
             Log.Debug("Ticket auth: version didn't match."); 
         } 
 
         var reply = MakeResponse<AuthenticateValidateTicketResultMessage>(client); 
         reply.Message.result = (valid) ? 0 : 1; 
         reply.Message.groupID = groupID; 
         reply.Message.npid = npid; 
         reply.Send(); 
     } 
 
     private class NPTicket 
     { 
         public int version; 
         public ulong clientID; 
         public ulong serverID; 
         public uint time; 
     } 
 
     private NPTicket ReadTicket(byte[] bytes) 
     { 
         var ticket = new NPTicket(); 
         ticket.version = BitConverter.ToInt32(bytes, 0); 
 
         if (ticket.version == 1) 
         { 
             ticket.clientID = BitConverter.ToUInt64(bytes, 4); 
             ticket.serverID = BitConverter.ToUInt64(bytes, 12); 
             ticket.time = BitConverter.ToUInt32(bytes, 20); 
         } 
 
         return ticket; 
     } 
 } 
....    
} 

请您参考如下方法:

在访问其位置 0、4、12 和 20 之前，检查 private NPTicket ReadTicket(byte[] bytes) 中 bytes 的大小。