How to Auto Increment Build/Version Numbers of Visual Studio Project and get in C#

Open "AssemblyInfo.cs"

Version information for an assembly consists of the following four values:

      Major Version

      Minor Version

      Build Number

      Revision

You can specify all the values or you can default the Revision and Build Numbers

by using the '*' as shown below:

Replace line

[assembly: AssemblyVersion("1.0.0.0")]

with

[assembly: AssemblyVersion("1.0.*")]

Remove or comment out below line

[assembly: AssemblyFileVersion("1.0.0.0")]

Here 1.0.0.0 Means [Major].[Minor].[Build].[Revision],

Now you should get new version number after each time you rebuild project.

C# code to get version number

var version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;

Label1.Text = string.Format("v{0}.{1}.{2} ({3})", version.Major, version.Minor, version.Build, version.Revision);

When to change each number?

• Major number when a core piece of the app is rewritten or reworked.
• Minor version when a new work order is processed
• Auto increament or leave the build number at zero,
• Auto increment the revision number every round of testing

In case of auto increament,

• Build number is the number of days since Dec 31, 1999. 
• The Revision number is the number of seconds since midnight, divided by 2.