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Solutions and Projects in Visual Studio

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This article applies to Visual Studio 2015. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here

When you create an app, application, website, Web App, script, plug-in, etc in Visual Studio, you start with a project. In a logical sense, a project contains of all the source code files, icons, images, data files and anything else that will be compiled into an executable program or web site, or else is needed in order to perform the compilation. A project also contains all the compiler settings and other configuration files that might be needed by various services or components that your program will communicate with.

In a literal sense, a project is an XML file (*.vbproj, *.csproj, *.vcxproj) that defines a virtual folder hierarchy along with paths to all the items it "contains" and all the build settings. In Visual Studio, the project file is used by Solution Explorer to display the project contents and settings. When you compile your project, the MSBuild engine consumes the project file to create the executable. You can also customize projects to product other kinds of output.

A project is contained, in a logical sense and in the file system, within a solution, which may contain one or more projects, along with build information, Visual Studio window settings, and any miscellaneous files that aren't associated with any project. In a literal sense, the solution is a text file with its own unique format; it is generally not intended to be edited by hand.

A solution has an associated *.suo file that stores settings, preferences and configuration information for each user that has worked on the project.

The following diagram shows the relationship between projects and solutions, and the items they logically contain.

Visual Studio projects and solutions

You can also create custom project and item templates. For more information, see Creating Project and Item Templates.

Creating new projects

The easiest way to create a new project is to start with a pre-defined project template, which consists of a basic set of pre-generated code files, config files, assets, and settings that get you started creating a particular type of application or website in a particular programming language. These templates are what you see in the New Project Dialog when you choose File | New | Project or File | New | Web Site from the main menu, and then navigate. For more information, see Creating Solutions and Projects and NIB Creating Projects from Templates.

Managing projects in Solution Explorer

After you create a new project, you use Solution Explorer to view and manage projects and solutions and their associated items. The following illustration shows Server Explorer with a C# solution that contains two projects.

Solution Explorer

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See Also

Visual Studio IDE