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Pete O'Hanlon wrote:

Well, you can do things analagous to this in Smalltalk.

namespace TestApp1
{
    using AgeInYears = System.Int32;

    class Program
    {
        static void Main(string[] args)
        {
            AgeInYears myAge = 10;
            AgeInYears oldAge = 50;
            AgeInYears timeUntilOldAge = oldAge - myAge;
        }
    }
}

Ron Beyer wrote:

AgeInYears oldAge = 50;

if (myAge >= oldAge)
    thisGuyIsDead = true;

if (myAge >= oldAge)
    BookSpaceInRetirementHome(this);

Ron Beyer wrote:

Yes, that's perfectly legal C# code.

Ron Beyer wrote:

Its also a really good way of making code impossible to follow.

Ron Beyer wrote:

works the same way that #define does in c++ to replace types.

using AgeInYears = System.Int32;
using AgeInDays = System.Int32;

...

AgeInYears yearAge = 10;
AgeInDays dayAge = 3650;

var myAge = yearAge + dayAge;    // OOPS!

namespace TestApp1
{
    using AgeInYears = System.Int32;
 
    class Program
    {
        static void Main(string[] args)
        {
            AgeInYears myAge = 10; // or whatever
            AgeInYears timeUntilOldAge = 10;
            AgeInYears oldAge = myAge + timeUntilOldAge;
        }
   }
}