C# 如何访问sharepoint Web部件中的安全网站？

如何访问sharepoint Web部件中的安全网站？下面的代码可以作为控制台应用程序使用，但如果在Web部件中运行，则会出现访问冲突

WebRequest request = WebRequest.Create("https://somesecuresite.com");
WebResponse firstResponse = null;
try 
{
    firstResponse = request.GetResponse();  
}  
catch (WebException ex)  
{ 

    writer.WriteLine("Error: " + ex.ToString());
    return;  
}

如果您访问一个不安全的站点，它也可以工作。有什么想法吗

Error: System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at System.Net.UnsafeNclNativeMethods.NativePKI.CertVerifyCertificateChainPolicy(IntPtr policy, SafeFreeCertChain chainContext, ChainPolicyParameter& cpp, ChainPolicyStatus& ps) at System.Net.PolicyWrapper.VerifyChainPolicy(SafeFreeCertChain chainContext, ChainPolicyParameter& cpp) at System.Net.Security.SecureChannel.VerifyRemoteCertificate(RemoteCertValidationCallback remoteCertValidationCallback) at System.Net.Security.SslState.CompleteHandshake() at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Net.TlsStream.CallProcessAuthentication(Object state) at System.Threading.ExecutionContext.runTryCode(Object userData) at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.ConnectStream.WriteHeaders(Boolean async) --- End of inner exception stack trace --- at System.Net.HttpWebRequest.GetResponse() 错误：System.Net.WebException:基础连接已关闭：接收时发生意外错误。--> System.AccessViolationException:尝试读取或写入受保护内存。这通常表示其他内存已损坏。 位于System.Net.UnsafeNclNativeMethods.NativePKI.CertVerifyCertificateChainePolicy（IntPtr策略、SafeFreeCertChain链接上下文、ChainPolicyParameter和cpp、ChainPolicyStatus和ps） 在System.Net.PolicyWrapper.VerifyChainPolicy（SafeFreeCertChain-chainContext、ChainPolicyParameter和cpp）中 位于System.Net.Security.SecureChannel.VerifyRemoteCertificate（RemoteCertValidationCallback RemoteCertValidationCallback） 在System.Net.Security.SslState.CompleteHandshake（）中 在System.Net.Security.SslState.CheckCompletionBeforeNextReceive（ProtocolToken消息，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartSendBlob（字节[]传入，Int32计数，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.ProcessReceivedBlob（字节[]缓冲区，Int32计数，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartReadFrame（字节[]缓冲区，Int32 readBytes，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartReceiveBlob（字节[]缓冲区，AsyncProtocolRequest asyncRequest） 在System.Net.Security.SslState.CheckCompletionBeforeNextReceive（ProtocolToken消息，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartSendBlob（字节[]传入，Int32计数，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.ProcessReceivedBlob（字节[]缓冲区，Int32计数，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartReadFrame（字节[]缓冲区，Int32 readBytes，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartReceiveBlob（字节[]缓冲区，AsyncProtocolRequest asyncRequest） 在System.Net.Security.SslState.CheckCompletionBeforeNextReceive（ProtocolToken消息，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartSendBlob（字节[]传入，Int32计数，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.ProcessReceivedBlob（字节[]缓冲区，Int32计数，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartReadFrame（字节[]缓冲区，Int32 readBytes，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartReceiveBlob（字节[]缓冲区，AsyncProtocolRequest asyncRequest） 在System.Net.Security.SslState.CheckCompletionBeforeNextReceive（ProtocolToken消息，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.StartSendBlob（字节[]传入，Int32计数，AsyncProtocolRequest asyncRequest） 位于System.Net.Security.SslState.ForceAuthentication（布尔值receiveFirst，字节[]缓冲区，AsyncProtocolRequest asyncRequest） 在System.Net.Security.SslState.ProcessAuthentication（LazyAsyncResult-lazyResult）上 在System.Net.TlsStream.CallProcessAuthentication（对象状态）中 位于System.Threading.ExecutionContext.runTryCode（对象用户数据） 在System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup（TryCode代码、CleanupCode backoutCode、Object userData）中运行 位于System.Threading.ExecutionContext.RunInternal（ExecutionContext ExecutionContext，ContextCallback回调，对象状态） 在System.Threading.ExecutionContext.Run（ExecutionContext ExecutionContext，ContextCallback回调，对象状态） 在System.Net.TlsStream.ProcessAuthentication（LazyAsyncResult）上 在System.Net.TlsStream.Write（字节[]缓冲区，Int32偏移量，Int32大小） 在System.Net.PooledStream.Write（字节[]缓冲区，Int32偏移量，Int32大小） 在System.Net.ConnectStream.WriteHeaders（布尔异步）-内部异常堆栈跟踪的末尾--- 在System.Net.HttpWebRequest.GetResponse（）中

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我曾经遇到过这个问题，并通过过度隐藏GetWebRequest方法解决了它：请参见此处：

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证书是否对该站点有效？是。。。似乎任何安全的网站都会导致此错误