C#, Microsoft.Office.Core

In order to include Microsoft.Office.Core into your C# project, you need to add a reference to

Office

It's not Microsoft.Office, just Office, which is confusing.

Creating an Image from a User Control - C#

I wanted to create an image from a "screen shot" of my user control. I wanted to be able to save a picture of the user control at any given moment, save that image to a file for later use.

It's easy!

1. Create a Bitmap object of the size of your control.

Bitmap picture = new Bitmap (800, 600);

2. Create a Graphics object from the Bitmap Object.

Graphics graphx = Graphics.FromImage(picture);

3. Draw your user control to the Graphics object.

CreateControl(graphx);

4. Save your picture to a file.

picture.Save(@"C:\ControlImage.bmp");

It's that simple!

Graphics, Form Double Buffer

I was trying to double buffer a graphic control I wrote. It would blink when redrawing. I was not double buffering because, the graph would not draw. I was using the control's CreateGraphics() method. You should use the e.CreateGraphics() on the paint event. This allows you to use the double buffer without the error of not drawing.

Checked C# overflow

Using the 'checked' keyword in C#, you can check for an overflow.

checked

{

int a = someInt * someOtherInt;

}

This will check if there is an overflow.

You cannot check a nested method or something similar.

checked

{

int a = SomeMethod(b, c);

}

This will not check for overflow.

If you nest the check block in a try-catch. You can catch the overflow error.

try

{

checked

{

int a = someInt * someOtherInt;

}

}

catch (OverflowException)

{

// do something.

}

This is how to check for an overflow.

Drawing C#

C# drawing methods only take 16 bit points.

This is very limiting when it comes to drawing large scale graphics.

C# Nullable Structs

You can make a struct type nullable by adding a ? at the end of the type.

(e.g

Point? myNullablePoint = ...

int? myNullableInt = ..

)

and so on..

Point C#

Points are structs and not nullable.

Just thought you should know.