How to copy one element of a generic collection

I need to copy one element o开发者_JS百科f a generic collection and add it to the list. Something similar to this:

private List<CalculationResult> cantileverResults = new List<CalculationResult>();
cantileverResults.Add(cantileverResults[previousIndex]);

The problem with this solution is that when I modify the new element, the previousIndex element changes as well. I believe this is because they are reference-type, not value-type. How can I just copy (clone?) the information from one element to another without affecting each other any further?

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You will need to create a new object when adding it.

This can be done in several ways - a helper method that takes an object of your type (CalculationResult) and returns a completely new one.

Perhaps have a constructor overload that does this.

There are many ways to achieve such a thing - implementing ICloneable and having the Clone method return a new object.

For example, if you were to create a constructor overload, this is how you could use it:

cantileverResults.Add(new CalculationResult(cantileverResults[previousIndex]));