existNotepad++Delete each line in the middle#The content from the beginning to the beginning of the line (including#By itself, regular expressions can be used:

✅ Operation steps:

1. Open Notepad++

2. pressCtrl + HOpen the 'Find and Replace' window

3. Set the following content:

• Find what：

  ^.*# 
  

  Or (if there may be no space after the '#'):

  ^.*#
  

• Replace with：

  (Leave blank)

4. Check:

   • ✅“Regular expression”

   • ❌ Do not check 'Match line breaks'

5. Click on 'Replace All'

📌 Example before and after effects:

Original text:

This is some content # This part will be deleted Keep part # Delete this part

After replacement:

This section will be deleted

If you only want to delete#Starting from the beginning to the lineend ofPlease tell me the content, I can give you another expression.