cannot create an instance of the abstract type or interface. how to solve this ???

• Sylvan.Data.Excel

  12 164 6.6 C#

  The fastest .NET library for reading Excel data files.

I would recommend taking a look at [Sylvan.Data.Excel](https://github.com/MarkPflug/Sylvan.Data.Excel) if all you are trying to do is read data out of excel. It is a library that I maintain, and is extremely fast and easy to use.

• NPOI

  16 5,510 9.1 C#

  a .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.

  

If you are trying to *create* Excel files, then you might take a look at [NPOI](https://github.com/nissl-lab/npoi) which is also open source with a permissive license. There is also [ClosedXml](https://github.com/ClosedXML/ClosedXML), which has these capabilities.

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• ClosedXML

  26 4,407 9.5 C#

  ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with the underlying OpenXML API.

  

If you are trying to *create* Excel files, then you might take a look at [NPOI](https://github.com/nissl-lab/npoi) which is also open source with a permissive license. There is also [ClosedXml](https://github.com/ClosedXML/ClosedXML), which has these capabilities.

Suggest a related project