Unity3d Program Packaging Error (the program is connected to the database for processing)

An error occurred while packaging this Unity3d program (the program was changed from XML data to a connected database):

Argumentexception:the Assembly System.Configuration isReferenced by System.Data. But the DLL isNot allowed to being included or could not being found. UnityEditor.AssemblyHelper.AddReferencedAssembliesRecurse (System.String AssemblyPath, System.Collections.Generic.List '1Alreadyfoundassemblies, system.string[] allassemblypaths, system.string[] Folderstosearch, System.Collections.Generic.Dictionary '2Cache) (at C:/buildagent/work/b0bcff80449a48aa/editor/mono/assemblyhelper.cs: the) UnityEditor.AssemblyHelper.AddReferencedAssembliesRecurse (System.String assemblypath, System.Collections.Generic.List '1Alreadyfoundassemblies, system.string[] allassemblypaths, system.string[] Folderstosearch, System.Collections.Generic.Dictionary '2Cache) (at C:/buildagent/work/b0bcff80449a48aa/editor/mono/assemblyhelper.cs: the) UnityEditor.AssemblyHelper.AddReferencedAssembliesRecurse (System.String assemblypath, System.Collections.Generic.List '1Alreadyfoundassemblies, system.string[] allassemblypaths, system.string[] Folderstosearch, System.Collections.Generic.Dictionary '2Cache) (at C:/buildagent/work/b0bcff80449a48aa/editor/mono/assemblyhelper.cs: the) UnityEditor.AssemblyHelper.FindAssembliesReferencedBy (system.string[] paths, system.string[] Folderstosearch ) (at C:/buildagent/work/b0bcff80449a48aa/editor/mono/assemblyhelper.cs:107) UnityEditor.HostView:OnGUI ()

Workaround:

Change the. NET 2.0 Sub in the API capability level to. NET 2.0 in Player settings.