' This example demonstrates the String.IsNullOrEmpty() method
Imports System

Class Sample
   Public Shared Sub Main()
      Dim s1 As String = "abcd"
      Dim s2 As String = ""
      Dim s3 As String = Nothing

      Console.WriteLine("String s1 {0}.", Test(s1))
      Console.WriteLine("String s2 {0}.", Test(s2))
      Console.WriteLine("String s3 {0}.", Test(s3))
   End Sub 'Main

   Public Shared Function Test(s As String) As [String]
      If [String].IsNullOrEmpty(s) = True Then
         Return "is null or empty"
      Else
         Return String.Format("(""{0}"") is not null or empty", s)
      End If
   End Function 'Test
End Class 'Sample 
'
'This example produces the following results:
'
'String s1 ("abcd") is not null or empty.
'String s2 is null or empty.
'String s3 is null or empty.
'

// This example demonstrates the String.IsNullOrEmpty() method
using System;

class Sample 
{
    public static void Main() 
    {
    string s1 = "abcd";
    string s2 = "";
    string s3 = null;

    Console.WriteLine("String s1 {0}.", Test(s1));
    Console.WriteLine("String s2 {0}.", Test(s2));
    Console.WriteLine("String s3 {0}.", Test(s3));
    }

    public static String Test(string s)
    {
    if (String.IsNullOrEmpty(s) == true) 
        return "is null or empty";
    else
        return String.Format("(\"{0}\") is not null or empty", s);
    }
}
/*
This example produces the following results:

String s1 ("abcd") is not null or empty.
String s2 is null or empty.
String s3 is null or empty.

*/

// This example demonstrates the String.IsNullOrEmpty() method
using namespace System;
String^ Test( String^ s )
{
   if ( String::IsNullOrEmpty( s ) == true )
      return "is null or empty";
   else
      return String::Format( "(\"{0}\") is not null or empty", s );
}

int main()
{
   String^ s1 = "abcd";
   String^ s2 = "";
   String^ s3 = nullptr;
   Console::WriteLine( "String s1 {0}.", Test( s1 ) );
   Console::WriteLine( "String s2 {0}.", Test( s2 ) );
   Console::WriteLine( "String s3 {0}.", Test( s3 ) );
}

/*
This example produces the following results:

String s1 ("abcd") is not null or empty.
String s2 is null or empty.
String s3 is null or empty.

*/

// This example demonstrates the String.IsNullOrEmpty() method
import System.*;

class Sample
{
    public static void main(String[] args)
    {
        String s1 = "abcd";
        String s2 = "";
        String s3 = null;

        Console.WriteLine("String s1 {0}.", Test(s1));
        Console.WriteLine("String s2 {0}.", Test(s2));
        Console.WriteLine("String s3 {0}.", Test(s3));
    } //main

    public static String Test(String s)
    {
        if (String.IsNullOrEmpty(s) == true) {
            return "is null or empty";
        }
        else {
            return String.Format("(\"{0}\") is not null or empty", s);
        }
    } //Test
} //Sample 
 /*
This example produces the following results:

String s1 ("abcd") is not null or empty.
String s2 is null or empty.
String s3 is null or empty.

*/