// System.IO.FileStream
[SecuritySafeCritical]
public virtual void Flush(bool flushToDisk)
{
    if (this._handle.IsClosed)
    {
        __Error.FileNotOpen();
    }
    this.FlushInternalBuffer();
    if (flushToDisk && this.CanWrite)
    {
        this.FlushOSBuffer();
    }
}