/// <summary>
/// Opens a <see cref="FileStream"/>
/// </summary>
public static FileStream OpenAppendFileStream(string path, FileAccess fileAccess, FileMode fileOption = FileMode.Open, FileShare shareMode = FileShare.Read, Int32 buffer = 0)
{
Contract.Requires(!String.IsNullOrWhiteSpace(path));
Contract.Ensures(Contract.Result <FileStream>() != null);
var fileHandle = Win32SafeNativeMethods.CreateFileForAppend(path, 0x0004 /* Internal Win Append Mode*/, shareMode, IntPtr.Zero, fileOption, 0, IntPtr.Zero);
var win32Error = Marshal.GetLastWin32Error();
if (fileHandle.IsInvalid)
{
Win32ErrorCodes.NativeExceptionMapping(path, win32Error); // Throws an exception
}
return(buffer > 0 ? new FileStream(fileHandle, fileAccess, buffer) : new FileStream(fileHandle, fileAccess));
}