Get complete row from Excel file based on a cell value in that row

Hi,
I have a coded UI test project and an excel (.xlsx) file (for data set up) in that project. And say the first column in the sheet is 'Key'. Now I want to retrieve the whole row based on the given 'Key' column value. I have seen some documentation to use LINQ and c#, but can anyone share a code snippet on this.

Thanks in advance!