An IComparer

In .Net you can very easily create a special class to handle comparing of (custom) objects. All you have to do is implement the IComparer or IComparer interface and implement it's one simple function: Compare.

So write a class that implements it:

public class MyComparer : IComparer<MyObj>
{
  public int Compare(MyObj x, MyObj y) {
    // If, for example you're working with an int:
    return x.IntProperty.CompareTo(y.IntProperty);

    // If, perhaps, it is a string:
    return string.CompareTo(x.StringProperty, y.StringProperty)
  }
}

The value you return must be negative if x is less then y, 0 if x is equal to y or greater then 0 if x is greater then y.

This can of course be used with things like MyCollection.Sort(new MyComparer()), really handy if you have strange objects.