new classes in for loop

Question

Currently I have the following code:

        DecisionVariable[] attributes = 
        {
            new DecisionVariable("Var1", 2),
            new DecisionVariable("Var2", 4),
            new DecisionVariable("Var3", 1),
            new DecisionVariable("Var4", 2),
            new DecisionVariable("Var5", 5),
        };

but I would like to create them using a For loop:

        DecisionVariable[] attributes = 
        {
            for (int i=0;i<49;i++)
            {
                new DecisionVariable ("Var" + i, iValues[i]);
            }
        };

In the second version C# tells me that "For" has an invalid expression.

Do I have a typo somewhere or is something like that generally not allowed, using a for loop in a constructor?

Answer 1

You can't use a for loop inside a collection initializer. Use this code instead:

DecisionVariable[] attributes = new DecisionVariable[49];
for (int i = 0; i < 49; i++)
    attributes[i] = new DecisionVariable ("Var" + i, iValues[i]);