`MagickImageCollection.ReadAsync` appends frames to the collection

[d2phap]

Magick.NET version

14.16

Environment (Operating system, version and so on)

Windows 11

Description

Calling MagickImageCollection.ReadAsync appends to the collection instead of replacing it.

Steps to Reproduce

var filePath = @$"C:\my\photo.tif"; // 2 pages
var imgColl = new MagickImageCollection();

imgColl.Ping(filePath);            // => ✅ imgColl.Count = 2
imgColl.Read(filePath);            // => ✅ imgColl.Count = 2
await imgColl.ReadAsync(filePath); // => ❌ imgColl.Count = 4 

Images

Note: This sample TIF contains 7 pages
Multipage TIFF Sample_.tif

[dlemstra]

This is a good catch! Thanks for finding this, I just pushed a patch to fix this in the next release.