https://learn.microsoft.com/zh-cn/dotnet/api/system.web.ui.themeableattribute.-ctor?view=netframework-4.8.1
ThemeableAttribute(Boolean) Constructor (System.Web.UI) | Microsoft Learn
Initializes a new instance of the ThemeableAttribute class, using the specified Boolean value to determine whether the attribute represents a type or member...
system webbooleanconstructoruimicrosoft
https://learn.microsoft.com/zh-cn/dotnet/api/system.web.ui.themeableattribute.istypethemeable?view=netframework-4.8.1
ThemeableAttribute.IsTypeThemeable(Type) Method (System.Web.UI) | Microsoft Learn
Returns a value indicating whether the Type passed to the method supports themes.
system webtypemethoduimicrosoft