Error when building NinjaTrader 8 custom project

[NeverDownMoney]

Hi all, I am getting the below error. Am I using the wrong version of .Net Framework?

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0579	Duplicate 'global::System.Runtime.Versioning.TargetFramework Attribute' attribute	NinjaTrader.Custom	C:\Users\someone\Documents\NinjaTrader 8\bin\Custom\obj\x64\Debug\.NETFramework,Version=v 4.5.AssemblyAttributes.cs	4	Active

[NeverDownMoney]

Never mind. I deleted the obj folder for this and it got rid of the problem. Strange that clean and rebuild all did not do the same thing.

[savinnrg]

NeverDownMoney - Thank you very much !!!

[NinjaTrader_ChelseaB]

Hello NeverDownMoney,

Do you have the .NET 4.8 SDK installed?
https://dotnet.microsoft.com/downloa...edium=referral

Have you attempted to build NinjaTrader from Visual Studio instead of compiling from the NinjaScript Editor?
(edit)
If so, within 'Documents\NinjaTrader 8\bin\Custom\' delete the 'obj' folder.

[kkc2015]

Hello NeverDownMoney. Thanks for solving the problem.

I have .NET 4.8 SDK installed and used the NT8 debugger but did not compile (may be accidentally with F5) the NT8 indicator in VS. I tried the following without success:
1. remove all occurrences of AssemblyAttributes.cs
2. deleting Documents\NinjaTrader 8\bin\Custom\bin folder
.