I have a employee list & autocomplte txtbox .My problem is autocomplete textbox is showing all names in the list including same names more than once how to restrict autocmpte txtbx to show only...

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C#

Iam having a employee list and an autocomplete textbox .Employee list contains same name more than once .My problem is autocomplete textbox is showing all names in the list including same names more than once. How to restrict autocomplete textbox to show only one copy of name.