C# to write a control, combobox drop-down tree, data can be carried out according to their needs recursive data binding

TreeComboBox
............\TreeComboBox
............\............\bin
............\............\...\Debug
............\............\...\.....\TreeComboBox.dll
............\............\BM_dropdown.bmp
............\............\Properties
............\............\..........\AssemblyInfo.cs
............\............\Thumbs.db
............\............\TreeComboBox.cs
............\............\TreeComboBox.csproj
............\TreeComboBox.sln
............\TreeComboBox.suo
............\TreeComboBoxTest
............\................\bin
............\................\...\Debug
............\................\...\.....\TreeComboBox.dll
............\................\...\.....\TreeComboBoxTest.exe
............\................\Form1.cs
............\................\Form1.Designer.cs
............\................\Form1.resx
............\................\Program.cs
............\................\Properties
............\................\..........\AssemblyInfo.cs
............\................\..........\Resources.Designer.cs
............\................\..........\Resources.resx
............\................\..........\Settings.Designer.cs
............\................\..........\Settings.settings
............\................\TreeComboBoxTest.csproj
............\................\user.bmp
TreeCombobox.jpg

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