'Declaration Public Property FirstSliceAngle As Nullable(Of Integer)
public Nullable<int> FirstSliceAngle {get; set;}
This property is only applicable to pie and doughnut charts.
The valid range for this property is between 0 and 360, inclusive.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2