PowerShell Regular Expressions Escape special characters
Example
A regex-pattern uses many special characters to describe a pattern. Ex., . means "any character", + is "one or more" etc.
To use these characters, as a .,+ etc., in a pattern, you need to escape them to remove their special meaning. This is done by using the escape character which is a backslash \ in regex. Example: To search for +, you would use the pattern \+.
It can be hard to remember all special characters in regex, so to escape every special character in a string you want to search for, you could use the [RegEx]::Escape("input") method.
> [regex]::Escape("(foo)")
\(foo\)
> [regex]::Escape("1+1.2=2.2")
1\+1\.2=2\.2
