C# detect USB device is plugged into the program is very simple. Note: The program used in the control of a USB device, the control has six methods, in addition to recognize the USB insert also detect USB unplug USB receive messages and other methods.

USB_test
........\UsbLibrary
........\..........\bin
........\..........\...\Debug
........\..........\...\.....\UsbLibrary.dll
........\..........\...\.....\UsbLibrary.pdb
........\..........\...\.....\UsbLibrary.XML
........\..........\HIDDevice.cs
........\..........\obj
........\..........\...\Debug
........\..........\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
........\..........\...\.....\Refactor
........\..........\...\.....\........\UsbLibrary.dll
........\..........\...\.....\TempPE
........\..........\...\.....\UsbLibrary.csproj.FileListAbsolute.txt
........\..........\...\.....\UsbLibrary.csproj.GenerateResource.Cache
........\..........\...\.....\UsbLibrary.dll
........\..........\...\.....\UsbLibrary.pdb
........\..........\...\.....\UsbLibrary.UsbHidBmp.bmp
........\..........\...\.....\UsbLibrary.UsbHidPort.resources
........\..........\...\UsbLibrary.csproj.FileList.txt
........\..........\...\UsbLibrary.csproj.FileListAbsolute.txt
........\..........\Properties
........\..........\..........\AssemblyInfo.cs
........\..........\Report.cs
........\..........\SpecifiedDevice.cs
........\..........\SpecifiedInputReport.cs
........\..........\SpecifiedOutputReport.cs
........\..........\UsbHidBmp.bmp
........\..........\UsbHidPort.cs
........\..........\UsbHidPort.Designer.cs
........\..........\UsbHidPort.resx
........\..........\UsbLibrary.csproj
........\..........\Win32Usb.cs
........\USB_test
........\USB_test.sln
........\USB_test.v11.suo
........\........\App.config
........\........\bin
........\........\...\Debug
........\........\...\.....\UsbLibrary.dll
........\........\...\.....\UsbLibrary.pdb
........\........\...\.....\UsbLibrary.xml
........\........\...\.....\USB_test.exe
........\........\...\.....\USB_test.exe.config
........\........\...\.....\USB_test.pdb
........\........\...\.....\USB_test.vshost.exe
........\........\...\.....\USB_test.vshost.exe.config
........\........\...\.....\USB_test.vshost.exe.manifest
........\........\Form1.cs
........\........\Form1.Designer.cs
........\........\Form1.resx
........\........\obj
........\........\...\Debug
........\........\...\.....\DesignTimeResolveAssemblyReferences.cache
........\........\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
........\........\...\.....\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
........\........\...\.....\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
........\........\...\.....\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs
........\........\...\.....\TempPE
........\........\...\.....\USB_test.csproj.FileListAbsolute.txt
........\........\...\.....\USB_test.csproj.GenerateResource.Cache
........\........\...\.....\USB_test.csprojResolveAssemblyReference.cache
........\........\...\.....\USB_test.exe
........\........\...\.....\USB_test.Form1.resources
........\........\...\.....\USB_test.pdb
........\........\...\.....\USB_test.Properties.Resources.resources
........\........\Program.cs
........\........\Properties
........\........\..........\AssemblyInfo.cs
........\........\..........\Resources.Designer.cs
........\........\..........\Resources.resx
........\........\..........\Settings.Designer.cs
........\........\..........\Settings.settings
........\........\USB_test.csproj

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