asp.net auto complete with jquery

I try to build auto complete jquery based on the below codes.
Can you tell me what I need to do?
I am new to jquery thanks

public static string[] GetBrand(string prefixText, int count)
        {
            List<string> productList = GetProductListByKeyword(prefixText, count);
            var list = from p in productList
                       where p.Contains(prefixText)
                       select p;
            string[] prefixTextArray = list.ToArray<string>();
            return prefixTextArray;
        }
        public static List<string> GetProductListByKeyword(string prefixText, int count)
        {
            try
            {                 
                    List<string> brandNames = new List<string>();                   
                    brandNames.Add("apple");
                    brandNames.Add("orange");
                    brandNames.Add("manago");
                    return brandNames;                
            }
            catch (Exception ex)
            {
                throw new ApplicationException("Something wrong in the query/database connection: ", ex);
            }

        }        
//aspx-----------------
<asp:TextBox runat="server" ID="keyword"></asp:TextBox>

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ITsolutionWizardAsked:
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leakim971PluritechnicianCommented:
Click here : http://jqueryui.com/autocomplete/#remote
And on "View Source link"
0
ITsolutionWizardAuthor Commented:
No. that is not .net page and you have to show me the codes here.
0
leakim971PluritechnicianCommented:
are you able to test you current service? what did it return ?
0

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ITsolutionWizardAuthor Commented:
it is not a service and it is working
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