
Through a forum post I discovered the NuGet package OpenHardwareMonitorLibCore and wanted to test it.
Apparently this is a wrapper of a very popular tool (https://openhardwaremonitor.org/) , with whose help you can read out all kinds of system properties. This includes the CPU and its sensors.
So I took a look at the library and built a short sample:
1using System;
2using System.Collections.Generic;
3using System.Linq;
4using System.Threading.Tasks;
5using OpenHardwareMonitor.Hardware;
6
7namespace ConsoleApp
8{
9 class Program
10 {
11 static async Task Main(string[] args)
12 {
13 Console.WriteLine("Read system information..." + Environment.NewLine);
14 Console.WriteLine("Results:");
15 SystemInfo systemInfo = await ReadSystemInfoAsync();
16
17 foreach (SystemInfo.CoreInfo cInfo in systemInfo.CoreInfos)
18 {
19 Console.WriteLine($"Name: {cInfo.Name} - {cInfo.Load} % - {cInfo.Temp} °C");
20 }
21
22 Console.WriteLine("Done.");
23 Console.ReadKey();
24 }
25
26 public static async Task<SystemInfo> ReadSystemInfoAsync()
27 {
28 return await Task.Run(() =>
29 {
30 SystemInfo systemInfo = new SystemInfo();
31
32 SystemVisitor updateVisitor = new SystemVisitor();
33 Computer computer = new Computer();
34
35 try
36 {
37 computer.Open();
38 computer.CPUEnabled = true;
39
40 computer.Accept(updateVisitor);
41
42 foreach (IHardware hw in computer.Hardware
43 .Where(hw => hw.HardwareType == HardwareType.CPU))
44 {
45 foreach (ISensor sensor in hw.Sensors)
46 {
47 switch (sensor.SensorType)
48 {
49 case SensorType.Load:
50 systemInfo.AddOrUpdateCoreLoad(
51 sensor.Name, sensor.Value.GetValueOrDefault(0));
52
53 break;
54 case SensorType.Temperature:
55 systemInfo.AddOrUpdateCoreTemp(
56 sensor.Name, sensor.Value.GetValueOrDefault(0));
57
58 break;
59 }
60 }
61 }
62 }
63 finally
64 {
65 computer.Close();
66 }
67
68 return systemInfo;
69 });
70 }
71 }
72
73 public class SystemInfo
74 {
75 public class CoreInfo
76 {
77 public string Name { get; set; }
78 public double Load { get; set; }
79 public double Temp { get; set; }
80 }
81
82 public List<CoreInfo> CoreInfos = new List<CoreInfo>();
83
84 private CoreInfo GetCoreInfo(string name)
85 {
86 CoreInfo coreInfo = CoreInfos.SingleOrDefault(c => c.Name == name);
87 if (coreInfo is null)
88 {
89 coreInfo = new CoreInfo { Name = name };
90 CoreInfos.Add(coreInfo);
91 }
92
93 return coreInfo;
94 }
95
96 public void AddOrUpdateCoreTemp(string name, double temp)
97 {
98 CoreInfo coreInfo = GetCoreInfo(name);
99 coreInfo.Temp = temp;
100 }
101
102 public void AddOrUpdateCoreLoad(string name, double load)
103 {
104 CoreInfo coreInfo = GetCoreInfo(name);
105 coreInfo.Load = load;
106 }
107 }
108
109 public class SystemVisitor : IVisitor
110 {
111 public void VisitComputer(IComputer computer) { computer.Traverse(this); }
112
113 public void VisitHardware(IHardware hardware)
114 {
115 hardware.Update();
116 foreach (IHardware subHardware in hardware.SubHardware) subHardware.Accept(this);
117 }
118
119 public void VisitSensor(ISensor sensor) { }
120 public void VisitParameter(IParameter parameter) { }
121 }
122}
This snippet reads all my cores as well as their name, load and temperature.
1 Read system information...
2
3 Results:
4 Name: CPU Core #1 - 50 % - 0 °C
5 Name: CPU Core #2 - 0 % - 0 °C
6 Name: CPU Core #3 - 0 % - 0 °C
7 Name: CPU Core #4 - 0 % - 0 °C
8 Name: CPU Core #5 - 0 % - 0 °C
9 Name: CPU Core #6 - 0 % - 0 °C
10 Name: CPU Core #7 - 0 % - 0 °C
11 Name: CPU Core #8 - 0 % - 0 °C
12 Name: CPU Core #9 - 0 % - 0 °C
13 Name: CPU Core #10 - 0 % - 0 °C
14 Name: CPU Core #12 - 0 % - 0 °C
15 Name: CPU Total - 4,17 % - 0 °C
16 Name: CPU Package - 0 % - 0 °C
17Done.
Unfortunately you can already see that the temperature of the cores is not read out. I couldn’t find out why.
Blocking Code
The NuGet package / lib does not offer any asynchronous methods, which means that the system properties have to be read within a Task or Thread. Otherwise, the UI of a Windows Forms or WPF application hangs. In the worst case Windows closes your application.
NET Core and .NET Framework
Unlike the .NET Framework, .NET Core itself does not provide any functionality to read such system information. The library is also not cross-platform capable and works with a .NET Core 3.0 console application only on Windows.
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