Csharp 是一个静态接口属性，对于每个可能的实现都是唯一的

您可以使其成为具有静态支持字段的实例属性(遵守C#命名约定):

public interface IDamagable
{
    float MaxHealth { get; set; }
    float CurrentHealth { get; set; }
}

public class Damagable : IDamagable
{
    private static float _maxHealth;
    public float MaxHealth { get => _maxHealth; set => _maxHealth = value; }

    public float CurrentHealth { get; set; }
}

C#11引入了static virtual members in interfaces，允许有效地声明必须由类实现的静态成员:

public interface IDamagable
{
    static abstract float MaxHealth { get; set; }
    float CurrentHealth { get; set; }
}

public class Damagable : IDamagable
{
    public Damagable()
    {
        CurrentHealth = MaxHealth;
    }

    public static float MaxHealth { get; set; } = 100;
    public float CurrentHealth { get; set; }
}

测试:

Damagable.MaxHealth = 100;
var d1 = new Damagable();
Damagable.MaxHealth = 95;
var d2 = new Damagable();
var d3 = new Damagable();
Console.WriteLine(d1.CurrentHealth);
Console.WriteLine(d2.CurrentHealth);
Console.WriteLine(d3.CurrentHealth);

打印:

100
95
95

如您所见，您必须通过类型名Damagable访问MaxHealth，因为它没有绑定到实例.