Autocomplete combobox for WPF

Question

I need an autocomplete combobox for WPF C#. I\'ve tried several approaches but nothing works. For example I\'ve tried a combobox:

Answer 1

Use ComboBox.Items.Filter to show items that fits the text written in the textbox. This is an example:

            If cmb.Text = "" Then
                cmb.Items.Filter = Nothing
            Else
                Dim T = cmb.Text
                cmb.Items.Filter = Nothing
                Dim I = cmb.Items.IndexOf(T)
                cmb.Items.Filter = Function(x As String)
                                       If x.StartsWith(T) Then Return True
                                       If x.Contains(" " & T) Then Return True
                                       Return False
                                   End Function

                If I = -1 Then
                    cmb.SelectedIndex = -1
                    cmb.Text = T
                    Dim txt As TextBox = cmb.Template.FindName("PART_EditableTextBox", cmb)
                    txt.SelectionStart = T.Length
                Else
                    cmb.SelectedIndex = 0
                End If

            End If