Error code: Duplicate Global System Runtime CS0579

[JohnS52]

Hello - I used the Indicator Wizard to create a basic Indicator to plot the OBV with 4 different moving averages. At some point I accessed Visual Studio and received a message saying I was using an older version of .Net framework and did I want to go back to it (if I remember correctly). I clicked yes and since then I have not been able to compile anything and have been getting the following message:



Can you tell me what I can do to rectify this? You can see it's referencing Line 4 but that's the using System.xml declaration and I can't comment that out of course. I am attaching a .txt file of the code because I can't do the Export with non-compiled code.

Checking other posts for the CS0579 error code: in NT8>bin>Custom I do not have a System.Runtime.Versioning or AssemblyAttributes file in that folder. I do have one AssemblyInfo.cs and a NinjaTrader.Custom.sln (Visual Studio Solution). Maybe if I do a fresh install that would solve the problem?

Thank you for any advice or suggestions.

[JohnS52]

Just solved it on my own - found a second .NetFramework in bin>Custom>obj>Debug dated 11/8/2021 (when I tried to use Visual Studio) and dragged it to the desktop - compiles fine now. Thank you.

[NinjaTrader_ChelseaB]

Hello JohnS52,

Solution was saved in Visual Studio or an attempt to compile was performed in VisualStudio and this causes Visual Studio to write an AssemblyAttribute.cs file.

Delete Documents\NinjaTrader 8\bin\Custom\obj folder to resolve