How to check if a printer exists in C# and VB.NET

To check if a printer exists in C# and VB.NET you can use the following snippet.

Sample C#

public static bool PrinterExists(string printerName)
{
	if (String.IsNullOrEmpty(printerName)) {  throw new ArgumentNullException("printerName");}
	return PrinterSettings.InstalledPrinters.Cast<string>().Any(name => printerName.ToUpper().Trim() == name.ToUpper().Trim());
}

Sample VB.NET

Public Shared Function PrinterExists(printerName As String) As Boolean
	If String.IsNullOrEmpty(printerName) Then
		Throw New ArgumentNullException("printerName")
	End If
	Return PrinterSettings.InstalledPrinters.Cast(Of String)().Any(Function(name) printerName.ToUpper().Trim() = name.ToUpper().Trim())
End Function

How to check if file or folder exists in Powershell

To check if file or folder exists in Powershell you can use the following snippet.

Sample Powershell

for files use it like this

if(test-path "C:\Users\Codesnippets\Desktop\Test.xml") 
{ 
	echo "exists!" 
} 
else 
{ 
	echo "not exists!" 
}

for folders/directories use it like this

if(test-path "C:\Users\Codesnippets\Desktop") 
{ 
	echo "exists!" 
} 
else 
{ 
	echo "not exists!" 
}