Top 20 NuGet autocomplete Packages

Selectize is a jQuery-based custom <select> UI control. Useful for tagging, contact lists, country selectors, etc.
This is a library for Asp.Net Core that provides some generic interfaces, conversions, paging helpers, exporters, extensions, and tag helpers
A library for textually searching arrays and hashes of objects by property (or multiple properties). Designed specifically for autocomplete.
DaData.ru API client for C# / .NET
A tiny autocomplete suggester
EditableComboBox and AutoComplete Controls available
This is a ComboBox control with a better suggestion list