Can I used IComparable Interface for struct?

Hello friends,
I have to sort array list which contains struct object.I am giving code here.can i use IComparable interface for struct to sort the list.
Tell me this is right which i have done.My code is working fine.

struct ScheduleReportStruct:IComparable
{
    public string m_ProjectName;
    public int m_ScheduleCnt;
    public ArrayList m_ResourceInfoList;
    public ArrayList m_ScheduleList;
    public float m_MakeSpan;
    public int CompareTo(object obj)
    {
        ScheduleReportStruct t_ScheduleReportStruct;
        t_ScheduleReportStruct = (ScheduleReportStruct)obj;
        return m_MakeSpan.CompareTo(t_ScheduleReportStruct.m_MakeSpan);
    }
}

ScheduleReportStruct t_ScheduleReportStruct=new ScheduleReportStruct();

myProjectlist.Add(ScheduleReportStruct);
myProjectlist.sort();

Thanks