The generated IL
----------------

    // method line 2
    .method public static  hidebysig 
           default void Main (string[] args)  cil managed 
    {
        // Method begins at RVA 0x20f4
        .entrypoint
        // Code size 54 (0x36)
        .maxstack 3
        .locals init (
                int32   V_0,
                int32   V_1)
        IL_0000:  ldc.i4.3 
        IL_0001:  stloc.0 
        IL_0002:  ldloc.0 
        IL_0003:  stloc.1 
        IL_0004:  ldloc.1 
        IL_0005:  ldc.i4.2 
        IL_0006:  beq IL_0017

        IL_000b:  ldloc.1 
        IL_000c:  ldc.i4.3 
        IL_000d:  beq IL_0026

        IL_0012:  br IL_0035

        IL_0017:  ldstr "2"
        IL_001c:  call void class [mscorlib]System.Console::WriteLine(string)
        IL_0021:  br IL_0035

        IL_0026:  ldstr "3"
        IL_002b:  call void class [mscorlib]System.Console::WriteLine(string)
        IL_0030:  br IL_0035

        IL_0035:  ret 
    } // end of method Switcher::default void Main (string[] args) 
  } // end of class Switcher

The C#
------
                int i = 3;

                switch (i)
                {       
                        case 2: 
                                Console.WriteLine("2");
                                break;
                        case 3: 
                                Console.WriteLine("3");
                                break;
                }