Fortran从c#读取二进制文件

我试图在fortran中读取二进制文件。该文件是用c#创建的。在下面的例子中，它只是存储为整数(我假设为4字节，因为创建的文件大小为8字节):

string binfile = @"c:'..'bindata.dat";
int nrecs = 60*60*24*61;
int nvalues = 34;
using (BinaryWriter bw = new BinaryWriter(File.Open(binfile, FileMode.Create)))
      {
        bw.Write(nrecs);
        bw.Write(nValues);        
      }

读取数据的fortran代码:

program TestFortran
    implicit none
    ! Variables
    character(*),parameter      ::  fn = "bindata.dat"
    integer                     ::  numMeas,numVals
    integer                     ::  infile,ios
    character(len=11)           ::   acc, seq, frm
    character(len=128)          ::  nam
    logical                     ::  ex,op
    integer                     :: irec, nr,p
    ! Body of TestFortran
    print *, 'Hello World'
    infile = 10
    open(unit = infile,file = fn,status='OLD',access='STREAM',FORM='UNFORMATTED',action='READ',iostat=ios)
    inquire(infile,err=99,exist=ex,opened=op,name=nam,access=acc,&
      sequential= seq, form = frm, recl=irec, nextrec=nr,pos=p)
    read(infile,IOSTAT=ios)  numMeas
    read(infile,IOSTAT=ios)  numVals
99  close(infile)
    write(*,'(a,i8,a,i6)')  "Number of measurements = ", numMeas, ", and number of values in a measurement = ", numVals
end program TestFortran

open和inquire命令运行正常。在调试模式下，open之后报告ios为0,inquire之后报告acc = 'STREAM'， ex = .true。， from =' un格式化'，irec = -1, name是文件的完整路径，nr = 0, op = .true。， p = 1 and seq = 'YES'.

当我运行第一个读语句ios = -1表示文件结束，numMeas没有设置为任何东西，同样的读取语句2

有谁知道这里出了什么问题吗?每一个提示都是非常感激的。