C:\Inetpub\wwwroot\WebApplication2\treebase.cs(150): The type or namespace name 'Category' could not be found (are you missing a using directive or an assembly reference?)

[sasire18]

hi I need help in almost all my cs files I am getting the following error:

C:\Inetpub\wwwroot\WebApplication2\treebase.cs(150): The type or namespace name 'Category' could not be found (are you missing a using directive or an assembly reference?)

Category, DefaultValue,Editor,DesignerSerializationVisibility,Browsable,HtmlTextWriter, IStateManager,StateBag,ParenthesizePropertyName,Control are coming i dont know the assembly reference for it It mainly occurs in this format

[DefaultValue("")]
[ParenthesizePropertyName(true)]
[ResDescription("BaseID")]

Can anyone help me in this regard sasi

[Guffa]

Look up the classes in the documentation[^], there you will se what namespace they belong to. After a while you will learn how the framework is organized, so that you'll know where many classes are. If you have a clue where the class might be, you can use the intellisense in Visual Studio. Start typing the namespace, and see if the class appears: System.Web.UI.C And you should see the Control class in the intellisense dropdown. --- b { font-weight: normal; }

[Ista]

you need to inherit from WebControl 1 line of code equals many bugs. So don't write any!!