MonoDevelop: The name 'Dictionary' does not exist in the current context

Unity Engine
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1

I’m using MonoDevelop 5.9.6, but each time I’m using a Dictionary, I get the error

error CS0103: The name 'Dictionary' does not exist in the current context

I did not forget the line

using System.Collections.Generic;

and Unity can run the script. What’s annoying me is that I can’t use auto-complete or debug and MonoDevelop is throwing errors everywhere.
The IDE is saying “FrameWork Mono / .NET 3.5 is not installed”, and doing “sudo apt-get install mono-reference-assemblies-3.5” changed nothing

It’s also happening for “Ienumerable” and “Ienumerator”.

I really don’t know what to do, can somebody help me please?

2

Found a fix! I had to install mono 2.0 and 4.0 by doing “sudo apt-get install mono-reference-assemblies-2.0” and
“sudo apt-get install mono-reference-assemblies-4.0”. Hope it will help anybody who gets that error!

2 Likes
3

How do I do that? The weird thing is that I have other classes that use Dictionary and List and do not give any trouble.

4

You probably don’t need to because you may have the dependencies already installed by other application that needs them. I like to install the MonoDevelop package from my distro’s official repository so I ensure that all the dependencies are installed even if I’m going to use the MonoDevelop integrated in Unity.

5

I found the problem. A silly thing. I was declaring Dictionaries like this Dictionary, instead of Dictionary<a,b> . =)