I am not trying to do anything fancy, but every row in the table has som sort of padding bottom. It looks like there is a \n in the end of the string.
+--------------------------------+ 
 |First Cell     | Second Cell    | 
 +--------------------------------+ 
 |Other Cell     | Other Really   | 
 |               | Big Cell       | 
 +--------------------------------+
I am using extension methods to add each row, I tryed the following comments but they didn't work as intended
public static void AddRow(this Table table, string[] cells)
{
    var row = table.AddRow();
    //row.HeightRule = RowHeightRule.Exactly;
    //row.Height = 20;
    //row.BottomPadding = 0;
    var i = 0;
    foreach (var cell in cells)
    {
        row.Cells[i].AddParagraph(cell);
        i++;
    }
}
				
                        
as @pdfsharp-team pointed out, there was a
ParagraphFormat.SpaceAfter = 10;that coused the issue.Thank you, @pdfsharp-team