public PieChart<T> LabelMemberPath<TProperty>(
System.Linq.Expressions.Expression<Func<T,TProperty>> expr
)
'宣言
Public Overloads Function LabelMemberPath(Of TProperty)( _
ByVal expr As System.Linq.Expressions.Expression(Of Func(Of T,TProperty)) _
) As PieChart(Of T)