ERROR_OUTOFMEMORY 14 (0xE) – Not enough storage is available to complete this operation.

• http://stackoverflow.com/questions/2881419/not-enough-storage-is-available-to-complete-this-operation-program-or-storage-m
• http://social.msdn.microsoft.com/Forums/en/sqlce/thread/06f90b9c-9c19-499e-b016-c161949251bc
• http://msdn.microsoft.com/en-us/library/aa454885.aspx#effective_memory_storage_power_mgmt_wm5_topic2
• http://support.microsoft.com/kb/326164

Let’s review the following code for creating a file path:

    public string GetFullPath(string fileName)
    {
        string folder = ConfigurationManager.AppSettings["MyFolder"];
        return folder + fileName;
    }

This code is prone to error. For example, when you set the folder setting, you have to remember to make sure it ends with a slash. To avoid such problems use Path.Combine() method which will ensure that the folder has ending slash:

    public string GetFullPath(string filename)
    {
        string folder = ConfigurationManager.AppSettings["MyFolder"];
        return Path.Combine(folder, filename);
    }

Do not reinvent function for generating unique name for temporary files. Use one of the existing methods:

• System.IO.Path.GetTempFileName() – use this method if you want to create temporary file in user’s temp folder.
• System.IO.Path.GetRandomFileName() – use this method if you just want to generate unique file name.

The ?? operator returns the left-hand operand if it is not null, or else it returns the right operand. For example:

int? x = null;

...

// y = x, unless x is null, in which case y = -1.

int y = x ?? -1;

The ?? operator also works with reference types:

//message = param, unless param is null
//in which case message = "No message"
string message = param ?? "No message";

System.Diagnostics.Stopwatch is a replacement for what most people probably do to identify the time spent on excecuting a method. The process usually goes something like: create a DateTime.Now value at the start and then subtract the ending DateTime.Now to get the TimeDuration value that elapsed.

As an alternative, the Stopwatch class was built using low-level API calls, with less overhead than other .NET methods. If the hardware and Windows version of the computer support a high-resolution performance counter, it will use this counter instead of the standard PC clock.

Here is a simple example:

System.Diagnostics.Stopwatch watch = new System.Diagnostics.Stopwatch();

watch.Start();

//do my stuff
...

watch.Stop();

MessageBox.Show("Time spent: " + watch.Elapsed.ToString());