Copy ObservableCollection to another ObservableCollection

Question

How to copy ObservableCollection item to another ObservableCollection without reference of first collection? Here ObservableCollection

Answer 1

You need to clone the object referenced by item before it's added to AllMetalRate, otherwise both ObservableCollections will have a reference to the same object. Implement the ICloneable interface on RateModel to return a new object, and call Clone before you call Add:

public class RateModel : ICloneable
{

    ...

    public object Clone()
    {
        // Create a new RateModel object here, copying across all the fields from this
        // instance. You must deep-copy (i.e. also clone) any arrays or other complex
        // objects that RateModel contains
    }

}

Clone before adding to AllMetalRate:

foreach (var item in MetalRateOnDate)
{
    var clone = (RateModel)item.Clone();
    AllMetalRate.Add(clone);
}