本文实例讲述了C#判断系统是32位还是64位的方法。分享给大家供大家参考。具体如下：

public static int GetOSBit() { 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 Int32.Parse(addressWidth); } catch (Exception ex) { return 32; } }

这里需要引用System.Management，该方法在以Guest用户登录的情况下抛出异常：

或者用以下方法：

[DllImport("kernel32.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool IsWow64Process([In] IntPtr hProcess, [Out] out bool lpSystemInfo); private static bool Is64Bit() { bool retVal; IsWow64Process( Process.GetCurrentProcess().Handle, out retVal); return retVal; }

这里需要引用System.Diagnostics

希望本文所述对大家的C#程序设计有所帮助。