Microsoft Graph Excel API

Question

Dear All We are currently working with Microsoft.Graph for manipulation and computation to read excel file from OneDrive and convert it into object which could be easily used in .Net platform. While we are able to get entire table rows from excel file into CSV format. However, we are dealing with huge dataset and therefore converting each CSV row into C# table format is resource intensive and time consuming which is impacting our productivity. We would prefer to get it in JSON which will allow us to directly use the object in our frontend in Angular 7. Having it as CSV forces us to read the data line record by record which is time consuming. I am therefore reaching out to you to request your help in identifying an alternative solution which is similar to Spire.xls/gembox that provides us with a table object which could be directly used for front end which also provide output in 4-5 seconds Regards