擴展方法必須在非泛型靜態類中定義錯誤 public static

Question

我的項目有問題。

我有這個代碼：

public static TitleInfoPacket GenerateTitInfo(this ICharacterDAO visualEntity)
{
    var visibleTitle = visualEntity.Titles.FirstOrDefault(s => s.Visible)?.TitleType;
    var effectiveTitle = visualEntity.Titles.FirstOrDefault(s => s.Active)?.TitleType;

    return new TitleInfoPacket
        {
            VisualId = visualEntity.VisualId,
            EffectiveTitle = effectiveTitle ?? 0,
            VisualType = visualEntity.VisualType,
            VisibleTitle = visibleTitle ?? 0,
        };
}

public TitlePacket GenerateTitle(this ICharacterDAO visualEntity)
{
    var data = visualEntity.Titles.Select(s => new TitleSubPacket
        {
            TitleId = (short)(s.TitleType - 9300),
            TitleStatus = (byte)((s.Visible ? 2 : 0) + (s.Active ? 4 : 0) + 1)
        }).ToList();

    return new TitlePacket
           {
                Data = data.Any() ? data : null
           };
}

我收到一個錯誤：

擴展方法必須在非泛型靜態類中定義

我嘗試了一切但仍然有這個問題有人可以解釋我做的不好或向我展示我想念的東西謝謝你們的任何回復

Answer 1

觀察我放置了 static 關鍵字

public static class MyExtensionsClass {

   // extension methods here
    public static TitleInfoPacket GenerateTitInfo(this ICharacterDAO 

 visualEntity)
    {
      var visibleTitle = visualEntity.Titles.FirstOrDefault(s => s.Visible)?.TitleType;
      var effectiveTitle = visualEntity.Titles.FirstOrDefault(s => s.Active)?.TitleType;
return new TitleInfoPacket
    {
        VisualId = visualEntity.VisualId,
        EffectiveTitle = effectiveTitle ?? 0,
        VisualType = visualEntity.VisualType,
        VisibleTitle = visibleTitle ?? 0,
    };
  }
}

希望這可以幫助！