C# Stack Modify Top Element

Question

If I want to modify the top of the Stack, how would I do that?

I know you can use Stack.Pop() and then push back the modified value, but that seems inelegant. Is there another way?

Example:

Stack<string> stringStack;
stringStack.Push("foo");
stringStack.Push("ba");
stringStack.Replace("bar"); //implementation 

This seems it has a really obvious answer to it. Don't know why it's not implemented yet.

Answer 1

You can create an extension method like this;

public static class StackExtensions
{
    public static void Replace<T>(this Stack<T> stack, T item)
    {
        stack.Pop();
        
        stack.Push(item);
    }
}

And you can use it like this;

var stringStack = new Stack<string>();
stringStack.Push("foo");
stringStack.Push("ba");
stringStack.Replace("bar");

foreach (var item in stringStack)
{
    Console.WriteLine(item);
}

Which will give you this output;

bar
foo