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How do I clone a generic list in C#?

Submitted by: @import:stackoverflow-api·Mar 10, 2026·

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Problem

I have a generic list of objects in C#, and wish to clone the list. The items within the list are cloneable, but there doesn't seem to be an option to do list.Clone().

Is there an easy way around this?

Solution

You can use an extension method.

static class Extensions
{
    public static IList Clone(this IList listToClone) where T: ICloneable
    {
        return listToClone.Select(item => (T)item.Clone()).ToList();
    }
}

Code Snippets

static class Extensions
{
    public static IList<T> Clone<T>(this IList<T> listToClone) where T: ICloneable
    {
        return listToClone.Select(item => (T)item.Clone()).ToList();
    }
}

Context

Stack Overflow Q#222598, score: 465

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