System.Reflection.ReflectionTypeLoadException: The classes in the module cannot be loaded.

I am trying to implement access to a SQLite database in my game to load some game data. To establish a connection to the database, I am using System.Data.SQLite which I imported to Visual C# 2012 Express using NuGet.

I believe it is this circumstance which caused Unity to spit the following error at me:

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Internal compiler error. See the console log for more information. output was: Unhandled Exception: System.Reflection.ReflectionTypeLoadException: The classes in the module cannot be loaded.

at (wrapper managed-to-native) System.Reflection.Assembly:GetTypes (bool)

at System.Reflection.Assembly.GetTypes () [0x00000] in :0

at Mono.CSharp.RootNamespace.ComputeNamespaces (System.Reflection.Assembly assembly, System.Type extensionType) [0x00000] in :0

at Mono.CSharp.RootNamespace.ComputeNamespace (Mono.CSharp.CompilerContext ctx,

System.Type extensionType) [0x00000] in :0

at Mono.CSharp.GlobalRootNamespace.ComputeNamespaces (Mono.CSharp.CompilerContext ctx) [0x00000] in :0

at Mono.CSharp.Driver.LoadReferences () [0x00000] in :0

at Mono.CSharp.Driver.Compile () [0x00000] in :0 at Mono.CSharp.Driver.Main (System.String[] args) [0x00000] in :0

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I am clueless about this. What does it mean and how can I fix it?