System.Data

Unity Engine
1

Hi!
I know mono has System.Data namespace, but unity can’t compile and it give me the error “the type or namespace ‘System.Data’ could not be found”.
How can I add the reference?

2

Upgrade to Unity 1.6.1.

3

I did it, maybe I have to reimport all assets?
I’ll try this night.

4

You don’t need to recompile your assets. Just use using namespace System.Data;
or import System.data in js.

5

It doesn’t work.
I have created a new project and typed this code

using System;
using System.Data;
using System.Collections;
using UnityEngine;


    public class Test
    {
        public string fileName; 
        void Start()
        {
            DataSet ds = new DataSet();
            ds.ReadXml(filename);
        }

    }

The error is
Assets/Test.cs(2) error: The type or namespace name ‘Data’ does not exist in the namespace ‘System’.Are you missing an assembly reference?

Unity version: 1.6.1 build 6908 - pro

6

For now:
Open /Applications/Unity/Unity.app/Contents/Frameworks/MonoCompiler.framework/compile_any.pl

replace line 111 with:
my @base_args=($mono_path, $mcs_path, ‘-debug’, ‘-r:System.Data.dll’, ‘-target:library’, ‘-nowarn:0169’, ‘-out:’.$output, );

7

I’ve been getting the same error and was wondering if this is still the solution for this as the thread is 5 years old now. Thanks!

8

4 years and some versions later… in Unity 5
Go to Project Settings > Player and change API Compatibility Level from .Net 2.0 Subset to full .Net 2.0.