为什么我可以在只读变量中设置字段的值?c

我编写了以下代码:

public class AppearanceDefinition<VertexInfo> where VertexInfo : struct
{
    public readonly ShaderProperty<bool> HasBorder; // READONLY VARIABLE
    public readonly ShaderProperty<float> BorderSize;

    internal readonly Shader[] Shaders;

    private readonly string VertexShaderCode;
    private readonly string FragmentShaderCode;

    public AppearanceDefinition(string vertexCode, string fragmentCode)
    {
        this.VertexShaderCode = vertexCode;
        this.FragmentShaderCode = fragmentCode;

        HasBorder = new ShaderProperty<bool>("HasBorder", ResourceKind.UniformBuffer, ShaderStages.Fragment, 0);
        BorderSize = new ShaderProperty<float>("BorderSize", ResourceKind.UniformBuffer, ShaderStages.Fragment, 0);
    }
}

public class ShaderProperty<T> where T : struct
{
    public readonly string Name;
    public readonly ResourceKind InternalDataType;
    public readonly ShaderStages ShaderStage;
    public readonly uint GroupId;

    private T _value;
    public T Value 
    { 
        get 
        {
            return _value;
        }
        set 
        {
            _value = value;
            // requires buffer update. 
        }
    }

    public ShaderProperty(string name, ResourceKind internalDataType, ShaderStages stage, uint group) 
    {
        this.Name = name;
        this.InternalDataType = internalDataType;
        this.ShaderStage = stage;
        this.GroupId = group;
        this._value = default(T);
    }
}

我这样使用它:

class Program
{
    static AppearanceDefinition<bool> test;

    static void Main(string[] args)
    {
        test = new AppearanceDefinition<bool>("", "");
        test.HasBorder.Value = true;
    }
}

这工作得很好,价值 HasBorder 更改从 false 到 true .
这很棒,因为我不想让人们重新分配价值 HasBorder 但我确实希望人们改变 HasBorder.Value 。但我在某种程度上可以更改只读变量,这感觉很奇怪。
有人能解释一下为什么这是可能的,是否有更好的方法?