How do I get skbitmap from resource "myimage.png"?

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I'm trying to display an SKBitmap image in Xamarin Forms (Android) using SkiaSharp. The PNG file is located in a folder named "Media" under the project "GraphicsTest.Android", and the Build Action property is set to "Embedded Resource". My code to create the bitmap follows the example shown at
https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/graphics/skiasharp/basics/bitmaps

string resourceID = "GraphicsTest.Android.Media.MyImage.png";
Assembly assembly = GetType().GetTypeInfo().Assembly;

using (Stream stream = assembly.GetManifestResourceStream(resourceID))
{
    MyBitmap = SKBitmap.Decode(stream); // exception thrown here
}

An exception is thrown - "System.ArgumentNullException: 'Value cannot be null'
indicating that the stream object is null.

What I have tried:

I have tried locating the .png file under 'Resources' folder.
I have tried variations of the resourceID string.
I always get the same exception.

Posted 27-Oct-21 5:36am

Member 11298827

Updated 8-Nov-21 7:32am

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Member 11298827 · Accepted Answer · 2021-11-08T07:32:00

After playing around with this I found the problem -
The above code was located in

MainPage()

following

InitializeComponent()

It compiled fine, but threw the exception at runtime.
When I moved the code to the event handler used to refresh the Skiasharp canvas, it worked okay.
Since I don't want to recreate the bitmap each time the event handler runs, I have to check to see if the bitmap is null first.
Can't figure out why that should be the case, but it is what it is.
Any explanation?