Top left and right corners radius are not proper

[jothiprakash111]

i tired setting cornerradius values manually but no use

[jothiprakash111]

i found a temporary solution

in my customview i added this line
myview.BackgroundColor = UIColor.Clear;

or
myview.Layer.CornerRadius= 8; //based on customalertview radius

this solves the corner radius problem