Reference to type 'Component' claims it is

问题:

Trying to get some WMI objects in a UWP application. Running VS2015 on .net 4.6.

I'm getting errors for the ForEach and method calls stating "Reference to type 'Component' claims it is defined in 'System'" with error CS7069.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Management;

namespace SystemInfo
{
    class wmiObject
    {
        static osDetails Program()
        {

            ManagementObjectCollection osDetailsCollection = getWMIObject("SELECT OSType, caption FROM Win32_OperatingSystem");
            osDetails Details = new osDetails();

            foreach (ManagementObject mo in osDetailsCollection)
            {
                Details.OSName = mo["Caption"].ToString();

            }

            osDetailsCollection = getWMIObject("SELECT Description, NumberOfLogicalProcessors, L3CacheSize from Win32_Processor");

            foreach (ManagementObject mo in osDetailsCollection)
            {
                Details.NumberOfLogicalProcessors = mo["NumberOfLogicalProcessors"].ToString();
                Details.L3CacheSize = mo["L3CacheSize"].ToString();
                Details.Description = mo["Description"].ToString();

            }
            ;

            return Details;
        }

        static ManagementObjectCollection getWMIObject(string query)
        {
            ManagementObjectSearcher objOSDetails = new ManagementObjectSearcher(query);
            ManagementObjectCollection osDetailsCollection = objOSDetails.Get();
            return osDetailsCollection;

        }

        class osDetails
        {
            public string Description;
            public string OSName;
            public string NumberOfLogicalProcessors;
            public string L3CacheSize;
        }

    }


}

Errors

Severity    Code    Description Project File    Line
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   41
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   18
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   20
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   26
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   28
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   29
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   30

Any help would be appreciated.

回答1:

This might work for you

foreach (ManagementObject mo in osDetailsCollection)
{
    foreach (PropertyData prop in mo.Properties)
    {
        if(prop.Name == "Caption")
        Details.OSName = prop.Value;
    }
}

回答2:

I just encountered this problem, and the solution I found was to remake the project as a C# WindowsFormsApp. It automatically added the references:

C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\Microsoft.CSharp.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Core.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Data.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Data.DataSetExtensions.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Deployment.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Drawing.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Net.Http.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Windows.Forms.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Xml.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.2\System.Xml.Linq.dll

Hopefully that helps someone out.