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thanks for the comment but it didn't work! <br />
other properties of my setup is shown in the attached image.<br />
<br />
<a href="https://filedb.experts-exchange.com/incoming/2008/10_w41/65915/properites.JPG" target="_blank" class="file-inline" title="properties of my setup project (32 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>properites.JPG</a>
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thanks for the comment but it didn't work!
other properties of my setup is shown in the attached image.

properites.JPG [https://filedb.experts-exchange.com/incoming/2008/10_w41/65915/properites.JPG]

properites.JPG

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First I checked and it didn't work but after second try I saw that it was working and I accept the solution.
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First I checked and it didn't work but after second try I saw that it was working and I accept the solution.

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<div class="content wysiwyg-content">
I made a setup project for my windows application and it works fine. But the problem is that if I install my application on a computer that I have already installed my application on, it'll install it again without any prompt for repair or remove options.<br />
<br />
How can I add repair and remove options for my setup project? 
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I made a setup project for my windows application and it works fine. But the problem is that if I install my application on a computer that I have already installed my application on, it'll install it again without any prompt for repair or remove options.

How can I add repair and remove options for my setup project? 

How to make my setup project to show Repair and Remove options when my application is already  intalled.

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.

.NET Programming

Installation is the act of making a computer program program ready for execution. Because the process varies programs often come with a specialized program responsible for doing whatever is needed for their installation. Installation may be part of a larger software deployment process. Cross platform installer builders that produce installers for Windows, Mac OS X and Linux include InstallAnywhere, InstallBuilder and Install4J. Installers for Microsoft Windows include Windows Installer, InstallShield, and Wise Installation Studio; free installer-authoring tools include NSIS, IzPack, Clickteam, InnoSetup, InstallSimple and WiX. Mac OS X includes Installer, and also includes a separate software updating application.

Installation

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).