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How to make custom file extension and encrypt?
I want :
1. write file that has my own file extension (example : .hwi) zip file
2. file format is zip file
3. but if user open that file with other zip program, that file crashed. but if user open that file with my program, that file will open successful
I try :
1. using chat GPT - fail
2. search
C# how to make custom file extension?
- fail6 replies