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Gets or sets the code of function calculating x-value of data point.
[Obsolete("The property has no effect for .Net 4.0 version. Please use XFunction property to specify function.")]
public string XFunctionCode { get; set; }
<Obsolete("The property has no effect for .Net 4.0 version. Please use XFunction property to specify function.")>
Public Property XFunctionCode As String