{System.UriFormatException: Invalid URI: The format of the URI could not be determined.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind, UriCreationOptions& creationOptions)
   at System.Uri..ctor(String uriString)
   at System.Xml.XmlResolver.ResolveUri(Uri baseUri, String relativeUri)
   at System.Xml.XmlTextReaderImpl.ConvertAbsoluteUnixPathToAbsoluteUri(String& url, XmlResolver resolver)
   at System.Xml.XmlTextReaderImpl..ctor(Stream stream, Byte[] bytes, Int32 byteCount, XmlReaderSettings settings, Uri baseUri, String baseUriStr, XmlParserContext context, Boolean closeInput)
   at System.Xml.XmlReaderSettings.CreateReader(Stream input, Uri baseUri, String baseUriString, XmlParserContext inputContext)
   at System.Xml.XmlReader.Create(Stream input, XmlReaderSettings settings, String baseUri)
   at System.Security.Cryptography.Xml.Utils.PreProcessStreamInput(Stream inputStream, XmlResolver xmlResolver, String baseUri)
   at System.Security.Cryptography.Xml.ExcCanonicalXml..ctor(Stream inputStream, Boolean includeComments, String inclusiveNamespacesPrefixList, XmlResolver resolver, String strBaseUri)
   at System.Security.Cryptography.Xml.XmlDsigExcC14NTransform.LoadInput(Object obj)
   at System.Security.Cryptography.Xml.TransformChain.TransformToOctetStream(Object inputObject, Type inputType, XmlResolver resolver, String baseUri)
   at System.Security.Cryptography.Xml.TransformChain.TransformToOctetStream(Stream input, XmlResolver resolver, String baseUri)
   at System.Security.Cryptography.Xml.Reference.CalculateHashValue(XmlDocument document, CanonicalXmlNodeList refList)
   at System.Security.Cryptography.Xml.Reference.UpdateHashValue(XmlDocument document, CanonicalXmlNodeList refList)
   at System.Security.Cryptography.Xml.SignedXml.BuildDigestedReferences()
   at System.Security.Cryptography.Xml.SignedXml.ComputeSignature(KeyedHashAlgorithm macAlg)
   at System.ServiceModel.Security.WSSecurityOneDotZeroSendSecurityHeader.CompletePrimarySignatureCore(SendSecurityHeaderElement[] signatureConfirmations, SecurityToken[] signedEndorsingTokens, SecurityToken[] signedTokens, SendSecurityHeaderElement[] basicTokens, Boolean isPrimarySignature)
   at System.ServiceModel.Security.WSSecurityOneDotZeroSendSecurityHeader.CreateSupportingSignature(SecurityToken token, SecurityKeyIdentifier identifier)
   at System.ServiceModel.Security.SendSecurityHeader.SignWithSupportingToken(SecurityToken token, SecurityKeyIdentifierClause identifierClause)
   at System.ServiceModel.Security.SendSecurityHeader.SignWithSupportingTokens()
   at System.ServiceModel.Security.SendSecurityHeader.CompleteSecurityApplication()
   at System.ServiceModel.Security.SecurityAppliedMessage.OnWriteMessage(XmlDictionaryWriter writer)
   at System.ServiceModel.Channels.Message.WriteMessage(XmlDictionaryWriter writer)
   at System.ServiceModel.Channels.BufferedMessageWriter.WriteMessage(Message message, BufferManager bufferManager, Int32 initialOffset, Int32 maxSizeQuota)
   at System.ServiceModel.Channels.TextMessageEncoderFactory.TextMessageEncoder.WriteMessageAsync(Message message, Int32 maxMessageSize, BufferManager bufferManager, Int32 messageOffset)
   at System.ServiceModel.Channels.TextMessageEncoderFactory.TextMessageEncoder.WriteMessage(Message message, Int32 maxMessageSize, BufferManager bufferManager, Int32 messageOffset)
   at System.ServiceModel.Channels.MessageEncoder.WriteMessage(Message message, Int32 maxMessageSize, BufferManager bufferManager)
   at System.ServiceModel.Channels.BufferedMessageContent.EnsureMessageEncoded() in D:\Projects\TasksMng\wcf-8.0.0-rtm\src\System.ServiceModel.Http\src\System\ServiceModel\Channels\MessageContent.cs:line 247
   at System.ServiceModel.Channels.BufferedMessageContent.TryComputeLength(Int64& length) in D:\Projects\TasksMng\wcf-8.0.0-rtm\src\System.ServiceModel.Http\src\System\ServiceModel\Channels\MessageContent.cs:line 268
   at System.Net.Http.HttpContent.GetComputedOrBufferLength()
   at System.Net.Http.Headers.HttpContentHeaders.get_ContentLength()
   at Xamarin.Android.Net.AndroidMessageHandler.SetupRequestBody(HttpURLConnection httpConnection, HttpRequestMessage request) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Xamarin.Android.Net/AndroidMessageHandler.cs:line 1258
   at Xamarin.Android.Net.AndroidMessageHandler.SetupRequestInternal(HttpRequestMessage request, URLConnection conn) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Xamarin.Android.Net/AndroidMessageHandler.cs:line 1118
   at Xamarin.Android.Net.AndroidMessageHandler.DoSendAsync(HttpRequestMessage request, CancellationToken cancellationToken) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Xamarin.Android.Net/AndroidMessageHandler.cs:line 481
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpClientRequestChannel.HttpClientChannelAsyncRequest.<SendRequestAsync>d__13[[System.ServiceModel.Channels.IRequestChannel, System.ServiceModel.Primitives, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].MoveNext() in D:\Projects\TasksMng\wcf-8.0.0-rtm\src\System.ServiceModel.Http\src\System\ServiceModel\Channels\HttpChannelFactory.cs:line 1056
   at System.ServiceModel.Channels.RequestChannel.RequestAsync(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.ClientReliableChannelBinder`1.<RequestAsync>d__24[[System.ServiceModel.Channels.IRequestChannel, System.ServiceModel.Primitives, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].MoveNext()
   at System.ServiceModel.Security.SecuritySessionClientSettings`1.SecurityRequestSessionChannel.<RequestAsync>d__11[[System.ServiceModel.Channels.IRequestSessionChannel, System.ServiceModel.Primitives, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].MoveNext()
   at System.Runtime.TaskHelpers.WaitForCompletionNoSpin[Message](Task`1 task)
   at System.ServiceModel.Security.SecuritySessionClientSettings`1.SecurityRequestSessionChannel[[System.ServiceModel.Channels.IRequestSessionChannel, System.ServiceModel.Primitives, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].System.ServiceModel.Channels.IRequestChannel.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(MethodCall methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(MethodInfo targetMethod, Object[] args)
   at generatedProxy_1.CheckConnection()
   at TasksMngMob.MainActivity.dothething() in D:\Projects\TasksMng\TestAndroid\MainActivity.cs:line 159}