Which version should i use for .net 4.0 development?

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I have a project for .net 4.0 on vs2015.

As the document on https://help.syncfusion.com/windowsforms/dotnet-framework-support-history, I tried .net v17, 16, 15 but not work. 

All the error like this.

The primary reference "Syncfusion.Grid.Base, Version=15.4460.0.20, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89" could not be resolved because it has an indirect dependency on the assembly "Syncfusion.Shared.Base, Version=15.4460.0.20, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89" which was built against the ".NETFramework,Version=v4.6" framework. This is a higher version than the currently targeted framework ".NETFramework,Version=v4.0". WindowsFormsApplication1

What should I do?

[Jagadeesan Pichaimuthu]

Hi Customer, 

 

Thanks for using Syncfusion product. 

 

We have analyzed the reported issue in our end, we found the assemblies which referred only the 4.6 version. This error occurred due to the mismatching of frame work version and Syncfusion assembly reference version. For this we suggest you to change the version of the application frame work in project file to 4.0 or use assembly reference as 15.4400.0.20. Otherwise you have to refer the dll’s that are installed in the system and the assembly details can be found from the following installed location. 

 

“<Installed Location>\Syncfusion\Essential Studio\15.4.0.20\precompiledassemblies” 

 

You can refer the below KB link to avoid the assembly conflicts, 

 

https://www.syncfusion.com/kb/6891/how-to-avoid-assembly-conflicts  

 

Also you can refer the below forum which provides more details about the same issue which you are faced. 

https://www.syncfusion.com/forums/116137/problem-with-assembly-reference-and-version  

 

Let us know whether this helps also if you need any further assistance on this. 

 

Regards, 

Jagadeesan