Using PowerShell to remove lines from a text file if it contains a string

Question

I am trying to remove all the lines from a text file that contains a partial string using the below PowerShell code:

 Get-Content C:\\new\\temp_*.txt | Selec         


        

Answer 1

The pipe character | has a special meaning in regular expressions. a|b means "match either a or b". If you want to match a literal | character, you need to escape it:

... | Select-String -Pattern 'H\|159' -NotMatch | ...