Hi Moustafa,
It’s possible to use the latest Syncfusion assemblies with
ILMerge.
Using IL Merge, we can combine all the Syncfusion assemblies
into a single assembly. However, all reference assemblies must be present in
the folder; otherwise, an Unresolved Assembly Reference Not Allowed
exception will be raised.
We have used IL Merge exe from the NuGet package below.
NuGet Link: https://www.nuget.org/packages/ilmerge/3.0.29
Argument For Merging: ILMerge.exe /log:OutputLog.txt
/out:Syncfusion.MergedAssembly.dll "C:\Users\Syncfusion\Desktop\
20.2.0.36\Licensed\4.0\Syncfusion.*.dll" /wildcards /allowDup
Please
see the link below for an example Syncfusion PDF project.
https://s3.amazonaws.com/files2.syncfusion.com/Installs/Support/175613/CreatePDFUsingMergedAssemblyTrial.zip
By referring
the merged assembly, we can access the Syncfusion namespaces and use the
assemblies.

Let us know if have any concerns.
Regards,
Jeyaseelan M