HttpException on OutputStream. How to correctly send file

I use code below to send file from ASP.NET Rest Api to client. Sometimes I see error logs "The remote host closed the connection. The error code is 0x800703E3." Is this correct method to send stream response?

var outputFileName;                   
context.Response.ContentType = WebHelper.GetMimeType(outputFileName);
context.Response.AddHeader("Content-Disposition", string.Format("{0}; filename={1}", "attachment", outputFileName));
context.Response.AddHeader("Content-Length", binaryData.Length.ToString());
context.Response.OutputStream.Write(binaryData, 0, binaryData.Length);
context.Response.Flush();
context.Response.Close();

This this:

context.Response.Clear();

context.Response.ContentType = ...;
context.Response.AddHeader( "Content-Disposition", ... );
// do not set Content-Length
context.Response.Write( binaryData );
context.Response.Flush();
context.Response.End();