获取系统内存大小(C#)

代码如下：

/// <summary>
/// 获取系统内存大小
/// </summary>
/// <returns>内存大小（单位M）</returns>
private static int GetPhisicalMemory()
{
ManagementObjectSearcher searcher = new ManagementObjectSearcher(); //用于查询一些如系统信息的管理对象
searcher.Query = new SelectQuery("Win32_PhysicalMemory ", "", new string[] { "Capacity" });//设置查询条件
ManagementObjectCollection collection = searcher.Get(); //获取内存容量
ManagementObjectCollection.ManagementObjectEnumerator em = collection.GetEnumerator();

long capacity = 0;
while (em.MoveNext())
{
ManagementBaseObject baseObj = em.Current;
if (baseObj.Properties["Capacity"].Value != null)
{
try
{
capacity += long.Parse(baseObj.Properties["Capacity"].Value.ToString());
}
catch
{
return 0;
}
}
}
return (int)(capacity / 1024 / 1024);
}