There are multiple ways to create a multiline string in PowerShell:

• You can use the special characters for carriage return and/or newline manually or use the NewLine-environment variable to insert the systems “newline” value)

"Hello`r`nWorld"
"Hello{0}World" -f [environment]::NewLine

• Create a linebreak while defining a string (before closing quote)

"Hello
World"

• Using a here-string. This is the most common technique.

@"
Hello
World
"@