如何将下面的VBA函数改为C#，C#如何定义Excel的Range类型？

Question

如何将下面的VBA函数改为C#，C#如何定义Excel的Range类型？多谢！

Function TheCell(RowNumber As Integer, Optional ColumnName As String = "A") As Range
    Set TheCell = ActiveSheet.Cells(RowNumber, ColumnName)
End Function

Answer 1

C#操作表格数据？我用的NPOI