SynopsisThis example creates an Excel file in a memory stream, dynamically, using OpenXML and AspNetCore. Then, it returns it to the user in the form of an Excel file with the proper mime type such that the user will be prompted to open the file with Excel. The Excel file sample shows how to create text cells, date ells, number cells, boolean cells, and cells with formulas. This example also demonstrates how to construct a stylesheet as well as formatting columns.    Read More.