I'm not sure how you can use these separate functions, but here are the functions to test another thing:
//Get system RAM private double GetSystemRam() { var searcher = new ManagementObjectSearcher("Select * From Win32_ComputerSystem"); double total_Ram_Bytes = 0; foreach (ManagementObject Mobject in searcher.Get()) { total_Ram_Bytes = (Convert.ToDouble(Mobject["TotalPhysicalMemory"])); Console.WriteLine("RAM Size in Giga Bytes: {0}", total_Ram_Bytes / 1073741824); } return total_Ram_Bytes; } //Get system processor speed private int GetprocessorSpeed() { var searcher = new ManagementObjectSearcher("select MaxClockSpeed from Win32_Processor"); int processorSpeed = 0; foreach (var item in searcher.Get()) { processorSpeed = Convert.ToInt32(item["MaxClockSpeed"]); Console.WriteLine("Processor Speed is(GHz):" + processorSpeed); } return processorSpeed; } //Get system maximum resolution private void GetMaxResolution() { using (var searcher = new System.Management.ManagementObjectSearcher("SELECT * FROM CIM_VideoControllerResolution")) { var results = searcher.Get(); UInt32 maxHResolution = 0; UInt32 maxVResolution = 0; foreach (var item in results) { if ((UInt32)item["HorizontalResolution"] > maxHResolution) maxHResolution = (UInt32)item["HorizontalResolution"]; if ((UInt32)item["VerticalResolution"] > maxVResolution) maxVResolution = (UInt32)item["VerticalResolution"]; } Console.WriteLine("Max Supported Resolution " + maxHResolution + "x" + maxVResolution); } } //Check for availability of keyboard private bool IsKeyboardAvailable() { bool isKeyboardAvailable = false; var searcher = new ManagementObjectSearcher("select * from Win32_Keyboard"); List<string> keyBoardName = new List<string>(); foreach (var item in searcher.Get()) { keyBoardName.Add(Convert.ToString(item["Name"])); Console.WriteLine("KeyBoard name is :" + item["Name"]); isKeyboardAvailable = true; } return isKeyboardAvailable; } //Check for availability of printer private bool IsPrinterAvailable() { bool isPrinterAvailable = false; var searcher = new ManagementObjectSearcher("Select * from Win32_Printer"); List<string> printerName = new List<string>(); foreach (var item in searcher.Get()) { printerName.Add(item["Name"].ToString().ToLower()); Console.WriteLine("Printer name is :" + item["Name"]); isPrinterAvailable = true; } return isPrinterAvailable; } //Check for availability of mouse private bool IsMouseAvailable() { bool isMouseAvailable = false; var searcher = new ManagementObjectSearcher("Select * from Win32_PointingDevice"); List<string> mouseType = new List<string>(); foreach (var item in searcher.Get()) { mouseType.Add(item["Name"].ToString().ToLower()); Console.WriteLine("Mouse type is :" + item["Name"]); isMouseAvailable = true; } return isMouseAvailable; }
NOTE: I just use Console.WriteLine so you can see the values and also use LIST, so if you want, you can use these elements.
Also read some articles, such as How to get hardware information (CPU ID, MainBoard information, hard disk serial number, system information, ...)