Thanks for your query.
Well, since you are using some older versions i.e., Aspose.Cells v3.7.x and Aspose.Excel 2.4.0 which I think might have compatibility issue with .NET framework version 3.5 or 4.x etc, But if you find .NET framework 2.0 compiled version of the component (Aspose.Cells/ Aspose.Excel) at your installation directory (in e.g net2.0 folder or so), you may try this version on .NET framework 3.5/4.0, it might work fine on it. If you do not have .NET framework 2.0 compiled version of the component(s), I am afraid, you cannot use Aspose.Cells or Aspose.Excel on .NET framework version 3.5/4.0.
We highly recommend you to kindly try and upgrade to our latest version/fix (e.g v8.5.1 (latest version)). FYI, Aspose.Excel had been discontinued some years ago and was merged or renamed to become Aspose.Cells . In latest versions of Aspose.Cells, we provide separate Dlls for different .NET framework versions (you may use even net2.0 version to use it on any .NET framework versions >=2 (i.e., 2.0, 3.x. 4.x etc.). Over the years, we have made lots of enhancements, included new features and included lots of fixes in the newer versions of the product. The latest versions of the product do support to read, write, manipulate, render or print Advanced MS Excel (2007/2010, 2013) file formats (e.g XLSX, XLSM, XLSB etc.). Moreover, we cannot evaluate or incorporate fixes to older versions, the fixes are only included into the latest versions based on latest APIs set. So, if you find any issue in latest version of the product, we are bound and try to fix it for the users. And, if you find any issue in your code segments, while upgrading to latest APIs of the component, we are here to help you.
Please see the Wiki Conf. Docs for your complete reference:
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