C# Save picturebox as jpeg with Save dialogue box

I have a jpeg shown in a picturebox on开发者_如何学编程 my WinForm program, I want to save this to a jpeg file and have the standard 'Save' dialogue box so I can select a location, how can I do this in C#?

Thanks Steven

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Read this post: save image files in C#

And then look here: http://msdn.microsoft.com/en-us/library/system.windows.forms.savefiledialog.aspx