ol.FSharpAsync<FileStream>">FSharpAsync&lt;FileStream&gt;</span> <strong>File.AsyncOpen.Static</strong>(<span title="System.string">string</span> path, <span title="System.IO.FileMode">FileMode</span> mode, <span title="Microsoft.FSharp.Core.FSharpOption<FileAccess>">FSharpOption&lt;FileAccess&gt;</span> access, <span title="Microsoft.FSharp.Core.FSharpOption<FileShare>">FSharpOption&lt;FileShare&gt;</span> share, <span title="Microsoft.FSharp.Core.FSharpOption<int>">FSharpOption&lt;int&gt;</span> bufferSiz