Which service(blob, file, queue, table) does this issue concern?

Append Blob using Storage Emulator 5.9.0.0

Which version of the SDK was used?

WindowsAzure.Stroage 9.3.3

Which platform are you using? (ex: .NET Core 2.1)

.Net framework 4.7.2 Console Application using HostBuilder

What problem was encountered?

`
String customDateTime = String.Format("{0:MM_dd_yyyy_H_mm}", DateTime.Now);

_cloudAppendBlob = container.GetAppendBlobReference($"{customDateTime}{_blobTable.BlobFileName}");

//The resulting name of the blob would be 09_24_2019_12_28_ProcessedCase.csv

AsyncHelper.RunSync(() => _cloudAppendBlob.CreateOrReplaceAsync());
`

All code runs successfully when using Azure cloud storage container.

Regardless of the file name used the call to CreateOrReplaceAsync throws

Exception Message

"The remote server returned an error: (400) Bad Request."

Stack Trace
at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.EndExecuteAsync[T](IAsyncResult result) in c:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\ClassLibraryCommon\Core\Executor\Executor.cs:line 51
at Microsoft.WindowsAzure.Storage.Blob.CloudAppendBlob.EndCreateOrReplace(IAsyncResult asyncResult) in c:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\ClassLibraryCommon\Blob\CloudAppendBlob.cs:line 2491
at Microsoft.WindowsAzure.Storage.Core.Util.AsyncExtensions.<>c__DisplayClass7.b__5(IAsyncResult ar) in c:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\ClassLibraryCommon\Core\Util\AsyncExtensions.cs:line 120
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at InsTech.ForeSight.Azure.Shared.AsyncHelper.RunSync(Func`1 func)
at InsTech.Metrics.AzureStorageProcessors.Internal.OutputProcessorCSV.WriteBufferInternalInitialize()
at InsTech.Metrics.AzureStorageProcessors.Internal.OutputProcessorCSV.WriteBuffer()
at InsTech.Metrics.Extensions.BaseOutputProcessor.ProcessDataTable(IMetricsEntity entity, TableDefinition tabledef, XDocument dataXDocument, ITableBufferProcessor tableBuffer, String tableName)
at InsTech.Metrics.Extensions.BaseOutputProcessor.ProcessDataTablesForMetricsEntity(IMetricsEntity entity, TableDefinitions tabledef, XDocument illustrationDataXDocument, XDocument quickViewDataXDocument, ITableBufferProcessor tableBuffer)
at InsTech.Metrics.Extensions.BaseOutputProcessor.ProcessMetricsEntity(IMetricsEntity entity, CancellationToken cancellationToken, Int32& recordsProcessed, Int32& errorsDetected, Int32& warningsDetected)
at InsTech.Metrics.AzureStorageProcessors.Internal.OutputProcessorBlobStorageCSV.InsTech.Metrics.Extensions.IOutputProcessor.ProcessMetricsEntity(IMetricsEntity entity, CancellationToken cancellationToken, Int32& recordsProcessed, Int32& errorsDetected, Int32& warningsDetected)
at MetricsHost.ProcessorFunction.ProcessMetricsEntity(IMetricsEntity entity) in D:\BHF\BHF6\DevB\ForeSight.Services\Metrics\MetricsHost\ProcessorFunction.cs:line 147
at MetricsHost.ProcessorFunction.StartAsync(CancellationToken cancellationToken) in D:\BHF\BHF6\DevB\ForeSight.Services\Metrics\MetricsHost\ProcessorFunction.cs:line 105

Inner Exception

   The remote server returned an error: (400) Bad Request.

Stack Trace
at Microsoft.WindowsAzure.Storage.Shared.Protocol.HttpResponseParsers.ProcessExpectedStatusCodeNoException[T](HttpStatusCode expectedStatusCode, HttpStatusCode actualStatusCode, T retVal, StorageCommandBase1 cmd, Exception ex) in c:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\Common\Shared\Protocol\HttpResponseParsers.Common.cs:line 54 at Microsoft.WindowsAzure.Storage.Blob.CloudAppendBlob.<CreateImpl>b__8f(RESTCommand1 cmd, HttpWebResponse resp, Exception ex, OperationContext ctx) in c:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\ClassLibraryCommon\Blob\CloudAppendBlob.cs:line 3356
at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.EndGetResponse[T](IAsyncResult getResponseResult) in c:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\ClassLibraryCommon\Core\Executor\Executor.cs:line 300