namespace OpenNest { public class Material { public Material() { } public Material(string name) { Name = name; } public Material(string name, string grade) { Name = name; Grade = grade; } public Material(string name, string grade, double density) { Name = name; Grade = grade; Density = density; } public string Name { get; set; } public string Grade { get; set; } public double Density { get; set; } } }