C# logic order and compiler behavior

DataTable myDt = new DataTable();
if (myDt != null && myDt.Rows.Count > 0)
{
    //do some stuff with myDt
}

myDt != null

myDt.Rows.Count > 0

if( x isNot Nothing AndAlso x.go()) then

if ( x.init() And y.init()) then   x.process(y)end y.doDance()

if (amHungry & whiteCastleIsNearby){   // The code will check if White Castle is nearby   // even when I am not hungry}if (amHungry && whiteCastleIsNearby){   // The code will only check if White Castle is nearby   // when I am hungry}

puts message unless message.nil?

unless message.nil?  puts messageend

a = new Log(); // Log class overloads the + operatora + "some string"; // Call the overloaded method - otherwise this wouldn't work because you can't normally add strings to objects.

a() || b() // be never runs if a is true

if (a() && b())

if (a() & b())

a = Foo( 5, GetSummary( "Orion", GetAddress("Orion") ) );

a = Foo(5, GetSummary("Orion", GetAddress("Orion")),           GetSummary("Chris", GetAddress("Chris")));

READ  0100  WRITE 0010  EXEC  0001

flags = READ & EXEC; // value of flags is 0101

if ( x.init() And y.init()) then
   x.process(y)
end
y.doDance()

Dim x As Formatting = Formatting.Bold Or Formatting.Italic
If (x And Formatting.Italic) = Formatting.Italic Then
    MsgBox("The text will be set in italic.")
End If