C# library for searching images on iqdb.org
static async void Run()
{
    IIqdbClient api = new IqdbClient();
    using (var fs = new FileStream("imageToSearch.jpg", FileMode.Open))
    {
        var searchResults = await api.SearchFile(fs);
    }
    
    var results = await api.SearchUrl("https://cs541604.userapi.com/c836722/v836722677/342ba/JKnecCszdCM.jpg");
}Install as NuGet package:
Install-Package IqdbApi- search more
 - ignore colors
 - preventing bans