CS0308 Marshal.SizeOf <>错误，如何解决？

Question

我在此代码中有错误：

            intPtr = Marshal.AllocHGlobal(Marshal.SizeOf<Win32API.OBJECT_BASIC_INFORMATION>(object_BASIC_INFORMATION));
            Win32API.NtQueryObject(zero, 0, intPtr, Marshal.SizeOf<Win32API.OBJECT_BASIC_INFORMATION>(object_BASIC_INFORMATION), ref num);
            object_BASIC_INFORMATION = (Win32API.OBJECT_BASIC_INFORMATION)Marshal.PtrToStructure(intPtr, object_BASIC_INFORMATION.GetType());
            Marshal.FreeHGlobal(intPtr);
            intPtr2 = Marshal.AllocHGlobal(object_BASIC_INFORMATION.TypeInformationLength);
            num = object_BASIC_INFORMATION.TypeInformationLength;

此行：

intPtr = Marshal.AllocHGlobal(Marshal.SizeOf<Win32API.OBJECT_BASIC_INFORMATION>(object_BASIC_INFORMATION));

我在做什么错了？

OBJECT_BASIC_INFORMATION：

        public struct OBJECT_BASIC_INFORMATION
    {
        public int Attributes;
        public int GrantedAccess;
        public int HandleCount;
        public int PointerCount;
        public int PagedPoolUsage;
        public int NonPagedPoolUsage;
        public int Reserved1;
        public int Reserved2;
        public int Reserved3;
        public int NameInformationLength;
        public int TypeInformationLength;
        public int SecurityDescriptorLength;
        public System.Runtime.InteropServices.ComTypes.FILETIME CreateTime;
    }

错误：

  

CS0308 C＃非泛型方法不能与类型参数一起使用