Azure Storage download excel .xls open and read into dataset

Getting the error: The type initializer for 'Excel.ExcelReaderFactory' threw an exception.

I am trying to download excel .xls (97 - 2003 format) from Azure Storage  and open the file and load it into a dataset.

I have installed the Nuget: Install-Package ExcelDataReader v3.3.0, but received compile errors.  So in addition I installed the excelDataReader-DevNet45 which complied successfully.

It seems I can connect and blockBlobReference.DownloadToStream(memoryStream); successfully.  

But when I try to exec the following line, I received the error: The type initializer for 'Excel.ExcelReaderFactory' threw an exception.

(I also tried the CreateOpenXmlReader as well) Same error.  I pasted my code in lower part of this post.  Thank you for your help!

//1. Reading from a binary Excel file ('97-2003 format; *.xls)
IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader(memoryStream);

private void ImportAzure()
{
try
{
string connectionString = ConfigurationManager.ConnectionStrings["StorageConnectionString"].ConnectionString;
string sourceContainerName = "hsc2"; // ConfigurationManager.AppSettings["sourcecontainerName"]; //source blob container name
string sourceBlobFileName = FileUpload1.FileName; // "test.xlsx"; //source blob name

var excelData = GetExcelBlobData(sourceBlobFileName, connectionString, sourceContainerName);
RadGrid1.DataSource = excelData;
RadGrid1.DataBind();

}
catch (Exception ex)
{
Console.Write("Error: ImportAzure: " + ex.Message);
}

}

/// <summary>
/// GetExcelBlobData
/// Gets the Excel file Blob data and returns a dataset
/// </summary>
/// <param name="filename"></param>
/// <param name="connectionString"></param>
/// <param name="containerName"></param>
/// <returns></returns>
private static DataSet GetExcelBlobData(string filename, string connectionString, string containerName)
{
DataSet ds = null; ;

try
{
// Retrieve storage account from connection string.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);

// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference(containerName);

// Retrieve reference to a blob named "test.xlsx"
CloudBlockBlob blockBlobReference = container.GetBlockBlobReference(filename);

using (var memoryStream = new MemoryStream())
{
//downloads blob's content to a stream
blockBlobReference.DownloadToStream(memoryStream);
/*
used open source Excel Data Reader - Read Excel files in .NET(http://exceldatareader.codeplex.com/)
Nuget: Install-Package ExcelDataReader (https://www.nuget.org/packages/ExcelDataReader/)

*/
//1. Reading from a binary Excel file ('97-2003 format; *.xls)
IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader(memoryStream);
//...
//2. Reading from a OpenXml Excel file (2007 format; *.xlsx)
//IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(memoryStream);

//var excelReader = ExcelReaderFactory.CreateOpenXmlReader(memoryStream);

ds = excelReader.AsDataSet();
excelReader.Close();
}

return ds;
}
catch (Exception ex)
{
Console.Write("GetExcelBlobData Error: " + ex.Message);
return ds;
}
}