How to custom control's property to new category in property window in asp.net

as for example

[Category("Appearance")]
        public string GridCssClass
        {
            set { CssClass = value; }
        }

this code will add Property GridCssClass to Property window under Appearance Category

My Question is that i want to make new category and add this property under newly created category

Just do it, Visual Studio will pick it up.

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