C# winform 下拉框复选，效果看我的文章

C:\Users\Administrator\Desktop\PComboBox\obj\Debug\xComboBox.MainForm.resources C:\Users\Administrator\Desktop\PComboBox\obj\Debug\xComboBox.Test.Resources.resources C:\Users\Administrator\Desktop\PComboBox\obj\Debug\xComboBox.PowerComboBox.resources C:\Users\Administrator\Desktop\PComboBox\obj\Debug\PowerComboBoxTest.csproj.GenerateResource.cache C:\Users\Administrator\Desktop\PComboBox\obj\Debug\PowerComboBoxTest.csproj.CoreCompileInputs.cache C:\Users\Administrator\Desktop\PComboBox\obj\Debug\xComboBox.exe C:\Users\Administrator\Desktop\PComboBox\obj\Debug\xComboBox.pdb C:\Users\Administrator\Desktop\PComboBox\obj\Debug\PowerComboBoxTest.csproj.AssemblyReference.cache C:\Users\Administrator\Desktop\PComboBox\bin\Debug\xComboBox.exe C:\Users\Administrator\Desktop\PComboBox\bin\Debug\xComboBox.pdb C:\Users\Administrator\Desktop\PComboBox\bin\Debug\xComboBox.xml