Family Instance Structural Type Property

public StructuralType StructuralType { get; }

public void GetStructuralType(FamilyInstance familyInstance)
{
    string message = "";
    switch (familyInstance.StructuralType)
    {
        case StructuralType.Beam:
            message = "FamilyInstance is a beam.";
            break;
        case StructuralType.Brace:
            message = "FamilyInstance is a brace.";
            break;
        case StructuralType.Column:
            message = "FamilyInstance is a column.";
            break;
        case StructuralType.Footing:
            message = "FamilyInstance is a footing.";
            break;
        default:
            message = "FamilyInstance is non-structural or unknown framing.";
            break;
    }

    TaskDialog.Show("Revit",message);
}