Azure Tables Storage Query returns 501 (Not Implemented)

I have some Data stored in Azure Data Tables and i’m using the following code to query the table:

var serviceClient = new TableServiceClient(_configuration["StorageConnectionString"]);
var tableClient = serviceClient.GetTableClient(TableName);
Pageable<EndpointEntity> queryResultsFilter = tableClient.Query<EndpointEntity>(filter: $"RowKey eq Test");
var entities = queryResultsFilter.ToList();

When ran this returns 501 Not Implemented.

RequestFailedException: The requested operation is not implemented on the specified resource.
Status: 501 (Not Implemented)
ErrorCode: NotImplemented

I tried removing the .ToList() and using foreach to iterate through instead

foreach(var x in queryResultsFilter)
{

}

But this returns the same error.

It seems like trying to do anything on the Pageable<EndpointEntity> is causing the 501 error. My EndPointEntity Looks like this:

 public class EndpointEntity : ITableEntity
    {
        public string PartitionKey { get; set; }
        public string RowKey { get; set; }
        public DateTime Timestamp { get; set; }
        public DateTime PerformanceDate { get; set; }
        public double TotalProcessingTimeMilliseconds { get; set; }
        public string JourneyID { get; set; }
        public DateTime ExpiryDate { get; set; }
        public string EntityType { get; set; }
        public ETag ETag { get; set; }
        DateTimeOffset? ITableEntity.Timestamp { get; set; }
    }

Which seems to be valid so I’m not sure why my query is returning an error?

>Solution :

I think it’s because of your filter expression – try enclosing the search value in your filter in single quotes:

Pageable<EndpointEntity> queryResultsFilter 
    = tableClient.Query<EndpointEntity>(filter: $"RowKey eq 'Test'");