How to Freeze Top Row and Apply Filter in Excel Automation with C#

Question

I have automation to create an Excel document from C#. I am trying to freeze the top row of my worksheet and apply filter. This is the same as in Excel 2010 if you select View >

Answer 1

workSheet.EnableAutoFilter = true; 
workSheet.Cells.AutoFilter(1); 

//Set the header-row bold
workSheet.Range["A1", "A1"].EntireRow.Font.Bold = true;  

//Adjust all columns
workSheet.Columns.AutoFit(); 

There could be some System.Reflection.Missing.Value that need to be passed with the arguments, but this was VB.Net code I've converted out of my mind.