public virtual void Rewrite()
{
if (this.Rewriteable)
{
throw new FitsException("Illegal attempt to rewrite data");
}
//FitsUtil.Reposition(input, fileOffset);
input.Seek(fileOffset, SeekOrigin.Begin);
Write(input);
try
{
input.Flush();
}
catch (IOException e)
{
throw new FitsException("Error in Rewrite Flush: " + e);
}
}