Question : How to display two types of  file format in OpenFileDialog in windows application using c#

My code
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openFileDialog1.Filter = "XLSX file(*.xlsx)|*.xlsx|XLSM file(*.xlsm)|*.xlsm";
 openFileDialog1.ShowDialog();

Now it is displaying either .xlsx or .xlsm files one type at a time. but it want to display both file format types in the dialog box at a time. Is't possible to display like this?

I don't want to change files type option in dialogbox from one type format to another to display the files.

Answer : How to display two types of  file format in OpenFileDialog in windows application using c#

try:

openFileDialog1.Filter = "Excel files (*.xlsx, *.xlsm)|*.xlsx;*.xlsm";