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Introduction

C# structs are closely related to classes. They have state and behavior. They have constructors that take arguments, instances can be assigned, tested for equality and stored in collections.

enum Unit
{
    Kg,
    Lb
}
struct Weight
{
    private double count;
    private Unit unit;

    public Weight(double count, Unit unit)
    {
        this.count = count;
        this.unit = unit;
    }

    public override string ToString()
    {
        return count.ToString() + unit.ToString();
    }
}

new Weight(77.5, Unit.Kg).ToString();
// => "77.6Kg"