Search notes:

PowerShell statement: using namespace

using namespace System.Windows.Forms

[MessageBox]::Show('Simple example for "using namespace"')

Github repository about-powershell, path: /language/statement/using/namespace/simple.ps1

Missing using directive

Note the typo:

PS: 2 C:/Users/rene> using namepsace System.Globalization
At line:1 char:6
+ using namepsace System.Globalization
+      ~
Missing using directive
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : MissingUsingStatementDirective

See also

using assembly and other statements

using