TOPIC:

when i change the color of the note using the method setFillColor:colorCode
and then refresh the page using RenderPrepare and RenderSync methods, my note disappears for some color codes such as 55000,20000,60000.

The same issue is solved for iOS by using 4278250080 instead of 55000, but when i assign the same value for Windows it is giving me error that it is uint and the property FillColor accepts int property. So is there any other way to solve this issue for Windows?

As my colleague told about iOS, you should enter an hex mask.
It's equivalent to decimal digit but much simpler to handle.
ie.: 0xFFFFFFFF to create a white annotation.