I have a Collection<T> property that wraps a array like

T[] array;

public Collection<T> Items
{
     get { return new Collection<T>(array); }
}

When I attempt to assign to the collection via:

T variable;
Items[i] = variable;

I get a NotSupportedException because the colleciton's IsReadOnly property is true. Turns out that this is a design choice by Microsoft. Does anyone know a workaround that does NOT involve enumeration? It could be done if the underlying data is not an array but I enjoy the performance gains because the data is fixed length.