C# 如何判断系统是64位还是32位

时间：2011-02-22 来源：Eric Sun

对于C#来说，调用WMI是一种简单易行的方式。我们可以用Win32_Processor类里面的AddressWidth属性来表示系统的位宽。AddressWidth的值受CPU和操作系统的双重影响。

具体的值如下面的表格所示：

	32bit OS	64bit OS
32bit CPU	AddressWidth = 32	N/A
64bit CPU	AddressWidth = 32	AddressWidth = 64

可以用下面的C#代码得到AddressWidth的值
(注意需添加引用System.Management）

public static string Distinguish64or32System()
        {
            try
            {
                string addressWidth = String.Empty;
                ConnectionOptions mConnOption = new ConnectionOptions();
                ManagementScope mMs = new ManagementScope("\\\\localhost", mConnOption);
                ObjectQuery mQuery = new ObjectQuery("select AddressWidth from Win32_Processor");
                ManagementObjectSearcher mSearcher = new ManagementObjectSearcher(mMs, mQuery);
                ManagementObjectCollection mObjectCollection = mSearcher.Get();
                foreach (ManagementObject mObject in mObjectCollection)
                {
                    addressWidth = mObject["AddressWidth"].ToString();
                }
                return addressWidth;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                return String.Empty;
            }
        }

关于WMI(Windows Management Instrumentation)的用途还有很多很多，将在我的下一篇文章中详细的介绍。