{"id":18352,"date":"2015-07-14T08:48:27","date_gmt":"2015-07-14T08:48:27","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/dotnet\/?page_id=4521"},"modified":"2018-09-07T13:14:13","modified_gmt":"2018-09-07T20:14:13","slug":"targetingdotnet-2","status":"publish","type":"page","link":"https:\/\/devblogs.microsoft.com\/dotnet\/p\/targetingdotnet-2\/","title":{"rendered":"Targeting .NET Framework Versions"},"content":{"rendered":"

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document.title = “Targeting .NET Framework Versions”;<\/p>\n

\n \n <\/a>Targeting .NET Framework Versions\n <\/div>\n

Every .NET app targets a particular .NET version. This is either the target version of the app project, which is automatically recorded with the app, or a version that is manually updated later. When an app is launched, the .NET runtime checks to see if this version is installed on a given machine before running an app. If that version is not installed, you will see an error message similar to the one shown in the image below.<\/p>\n

\"clip_image001\"<\/p>\n

It is important that the correct version of the .NET Framework is installed prior to running an app, or else an app will not run correctly.<\/p>\n

You should validate that the correct version is installed. You can look at the Installing a .NET Framework Version Required by an Application<\/a> page to fine the .NET Framework version you need. You can also look at the .NET SDKs and Targeting Packs<\/a> page to find the runtime version you need.<\/p>\n

You may also want to troubleshoot why you are seeing this error. The .NET team has provided the following resources to help you:<\/p>\n