Create a social media post with SkiaSharp on Xamarin -- 3

I am trying for a long time but I coudnt. I need to creat a social media post with SkiaSharp. There will be an Square and text where it been in the middle of Square. And I need this canvas as an Bitmap for share. It means I will not use this image at Xaml page. I want a function which return an image like this; getImage("Example text here",#D4D4D4) I will send an string and background colour to function, and it will return an image like attachment. Text alignment must be centre and multiline. Thats all. Please help me Thank you.