Element documentation headers should not be followed by blank line (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1506.md)

Constructor summary documentation should begin with standard text (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1642.md)

Constructor summary documentation should begin with standard text (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1642.md)

Element documentation headers should not be followed by blank line (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1506.md)

'Arc.StrokeStartLineCapProperty' hides inherited member 'Shape.StrokeStartLineCapProperty'. Use the new keyword if hiding was intended.

Possible null reference assignment.

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

Dereference of a possibly null reference.

Dereference of a possibly null reference.