Select case. The C# language has no "select case" statement. But this idea of a special construct where constants can be selected is implemented with the "switch" keyword.

For many programs, we can convert a select-case statement easily to a switch statement. Cases cannot be stacked (on separate lines) in VB.NET, unlike in C#. This is important.

Switch example. This example program uses a switch statement. We have three "case" blocks and a default block. The cases 100 and 1000 share the same code.

using System;

class Program
{
    static void Main()
    {
        int value = 100;
        switch (value)
        {
            case 10:
                Console.WriteLine("A");
                break;

            case 100:
            case 1000:
                // Two cases stacked on each other.
                Console.WriteLine("B");
                break;

            default:
                // Default case.
                Console.WriteLine("DEFAULT");
                break;
        }
    }
}
B

Select case example. Here is the equivalent "select case" example in VB.NET. Note how we use the "Select" keyword, and the cases 100 and 1000 must be specified on the same line.

Module Module1

    Sub Main()
        Dim value As Integer = 100

        Select Case value
            Case 10
                Console.WriteLine("A")

            Case 100, 1000
                ' Two cases stacked on one line.
                ' ... You cannot put each on a separate line.
                Console.WriteLine("B")

            Case Else
                ' Default case.
                Console.WriteLine("DEFAULT CASE")

        End Select
    End Sub

End Module
B

Some final notes. With C# we invoke the "switch statement" instead of a "select case" statement. The implementation (to some extent, with the exclusion of string switches) is shared.