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#VB NET 2010 CONSOLE APPLICATION LINE HOW TO#
#VB NET 2010 CONSOLE APPLICATION LINE CODE#

MFileStream.Write(bytes, 0, bytes.

'Here is where we actually write to both streamsĭim bytes As Byte() = Encoding.GetBytes(value) 'First we need to get the bytes to write, we do this by calling the GetBytes function from the encoding and passing the string Public Overrides Sub Write(ByVal value As String) Basically, we are just adding a new line to the end of the message and calling the Write function 'Here we are overriding the WriteLine function. Public Overrides Sub WriteLine(ByVal value As String) Return mEncoding 'Returns the encoding we took from the original console stream 'Required, as Encoding is declared as MustOverride in the TextWriter class Public Overrides ReadOnly Property Encoding As Encoding 'Constructor: takes the encoding and console stream from the original console output and the filestream to write to Public Sub New(ByVal encoding As Encoding, ByVal fStream As FileStream, ByVal consoleStream As Stream) Private mConsoleStream As Stream 'Stores the Stream to write to (so the messages still appear on the console window), this is also passed from the original Console Output Stream Private mFileStream As FileStream 'Stores the FileStream to write to (the log file) Private mEncoding As Encoding 'Stores the encoding, passed from the original Console Output Stream The temptation to hide warnings in Visual Studio’s “Error List” window can lead to a buildup of hidden or ignored warnings.Inherits TextWriter 'This is the original class for the console's output This very common issue erodes the strict type checking provided by the C# compiler. In Visual Studio, do this by putting your cursor over the object’s name and pressing F12.įor a more in-depth explanation of the reference/value error, see this tutorial. To fix the problem, look at definitions of the object types. Point point1 = new Point(20, 30) Ĭonsole.WriteLine(point1.X) // 20 (does this surprise you?)Ĭonsole.WriteLine(pen1.Color) // Blue (or does this surprise you?)

The example below shows a couple of unwanted surprises. In C#, the programmer who writes the object decides whether the value assigned to it is a value or a reference to another object. Using a Reference Like a Value or Vice Versa There’s a great tutorial that gives more detail on fixing this issue here.

Add a TraceListener so you know right away when a data binding breaks.

Add a Value Converter that Breaks into the Debugger.

Here are a couple of other fixes for the broken data bindings error: We can fix this by enabling tracing to the output window to reveal any problems: Frustratingly, it won’t show errors in Visual Studio’s output window. In the example below, there’s a TextBlock with a missing data context. When they break, they’re one of the more frustrating. NET error, see this article from Dot Net Perls.ĭata bindings in WPF can be a huge time saver – when they work well. by the application, which is displayed in this text window, one line at a time.

#VB NET 2010 CONSOLE APPLICATION LINE HOW TO#

For more detail on how to handle this. Apart from Windows applications, you can use Visual Studio 2008 to build.

Use validation on critical user inputs to prevent zero values.

Set guards on functions that throw errors in the event of a zero value.

Start Microsoft Visual Studio Create a new Console Application named GCS1. Console application, Command line application.

#VB NET 2010 CONSOLE APPLICATION LINE CODE#

Use Try/Catch blocks to catch the exception. For example, it can be used on its own line, which simply means that the user. Visual Studio 2010 comes with many project templates to create the necessary boilerplate code and files.

Ways to fix/prevent DivideByZeroException: TODO: Write code that should run when x is 0 To handle it gracefully, protect any code that does arithmetic division within try-catch blocks that look for that specific exception. The DivideByZeroException error gets thrown whenever a program tries to divide by zero.

See examples for avoiding the NullReferenceException.

Use Debug.Assert to catch the problem before the exception occurs.

Build null checking into the code and set default values.

The second line above will throw a NullReferenceException because we can’t call the method on a string that points to null. In the very simple example below, the string “foo” is set to null.

NET exception gets thrown whenever we try to use a class reference that’s set to null/Nothing, when the code expects otherwise.