string Destination = "SRM-System-Check-" + DateTime.Now.ToString("dd-MM-yyyy_HH_mm") + ".xlsx"
Should work.
Please also check below page for more details on date->string formatting:
string Destination = "SRM-System-Check-" + DateTime.Now.ToString("dd-MM-yyyy_HH_mm") + ".xlsx"
Should work.
Please also check below page for more details on date->string formatting: