properties - Strange C# property definition(indexer) -

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how different normal property in c#?

    public new point3d this[int index]     {         { return base[index]; }         set         {             base[index] = value;             collectionmodified();         }

this indexer; instead of being used obj.foo, used obj[index], i.e.:

var oldval = obj[1]; obj[1] = newval;

it "different" because:

  • it has no explicit name
  • it accepts parameter (or parameters)

note indexer parameters not have integers; can sorts:

dictionary<string, decimal> lookup = ... string employeekey = "000006"; decimal salary = lookup[employeekey];

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