C# save a DataGridView Directory Comparison to CSV with special filename for C# Windows App -

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i created button allow user create csv based on directory comparison. compiled code, , looks ok. go run program, however, , "access denied" error.

private void button1_click_1(object sender, eventargs e)     {         string csv = string.empty;         folderbrowserdialog fbd = new folderbrowserdialog();         using (var sfd = new savefiledialog())         if (fbd.showdialog() == system.windows.forms.dialogresult.ok)         {             string folderpath = fbd.selectedpath;             string filename = "dir_" + (datetime.now.toshortdatestring()) + ".csv";                  file.writealltext(folderpath + "dir_" + (datetime.now.toshortdatestring()) + ".csv", csv);          }

is there way save datagridview csv file extension give in filename string?

do have permission write on folder?

try use file.writealllines:

file.writealllines(folderpath + "dir_" + (datetime.now.toshortdatestring()) + ".csv", csv);

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