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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(195.2, 82%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ES%3C/text%3E%3C/svg%3E)
The following error occurs when trying to develop a "Class Library"
Error BC30663 Attribute 'TargetFrameworkAttribute' cannot be applied multiple times.
I cannot find a solution why this is occuring.
I opened the AssemblyInfo.vb file and did not find any attribute applied multiple times. Why is this error displaying?
I searched in the project for this attribute: "TargetFrameworkAttribute " and I found it in SystemRuntime.xml. I found may files with this name.
I do not understand xml language and I therefore cannot figure out this error.
Any suggestion will be greatly appreciated.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 78%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETS%3C/text%3E%3C/svg%3E)
Hi @Simon ,
You can search TargetFramework instead of TargetFrameworkAttribute in your project. If there’s a TargetFramework attribute in your AssemblyInfo.vb file, you can try to remove it and build your project again. Besides, I’m not sure where this error appears, maybe in VS Error List Window? If so, is there a File column that indicates where this error appears(like the following screenshot)?
Answer accepted by question author
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(256, 32%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMT%3C/text%3E%3C/svg%3E)
Open your vbproj file. Look for TargetFramework. It might be in there multiple times for some reason.