Merge dimodi-patch-1-spreadsheet-3307 into production (#3313)

* docs(Spreadsheet): Explain that we expect XLSX files

* Update components/spreadsheet/overview.md

* Update components/spreadsheet/overview.md

* Update components/spreadsheet/overview.md

* Update components/spreadsheet/overview.md

---------

Co-authored-by: Dimo Dimov <[email protected]>

Author: github-actions[bot]

components/spreadsheet/overview.md

@@ -18,7 +18,7 @@ The Spreadsheet for Blazor enables users to view and edit tabular data with an E
 To use the Telerik Spreadsheet for Blazor:
 
 1. Add the `TelerikSpreadsheet` tag.
-1. (optional) Set the `Data` parameter to a byte array to load an existing Excel file.
+1. (optional) Set the `Data` parameter to a byte array to load an existing Excel file in Open XML (XLSX) format. [Using other formats is also possible](#spreadsheet-file-format).
 
 >caption Basic Blazor Spreadsheet
 
@@ -46,6 +46,16 @@ To use the Telerik Spreadsheet for Blazor:
 ````
 
 
+## Spreadsheet File Format
+
+The Telerik Spreadsheet component loads and exports files in the Open XML SpreadsheetML (XLSX) format. If you want to work with other formats, consider [Telerik Document Processing](slug:dpl-in-blazor). The library includes [different Spreadsheet `FormatProvider`s](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/formats-and-conversion/general-information), which allow you to convert from one format to another. Here are a few possible use cases:
+
+* Convert a [CSV](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/formats-and-conversion/csv/csvformatprovider#import) or [XLS](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/formats-and-conversion/import-and-export-to-excel-file-formats/xls/xlsformatprovider#import) file to [XLSX](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/formats-and-conversion/import-and-export-to-excel-file-formats/xlsx/xlsxformatprovider#export). Use the correct `FormatProvider`, depending on the format that you want to `Import()` to a Telerik [`Workbook`](https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/working-with-workbooks/working-with-workbooks-what-is-workbook) and `Export()` to an office file format. Then, use the generated XLSX byte array to set the Spreadsheet `Data` parameter.
+* Convert an [XLSX file that was exported by the Telerik Spreadsheet](#spreadsheet-reference-and-methods) to another office document format before saving.
+* [Create an XLSX file from `IEnumerable` and pass it to the Spreadsheet](slug:spreadsheet-kb-bind-to-json-ienumerable-list-collection).
+* [Read an exported XLSX file and obtain all cell values](slug:spreadsheet-kb-get-cell-values).
+
+
 ## Tools
 
 The Spreadsheet provides built-in tools that perform various actions such as: