hi ‘im using this error :
"Assets/Scripts/Terminal.cs(3,14): error CS0234: The type or namespace name Data' does not exist in the namespace System’. Are you missing `System.Data’ assembly reference?, "
even if i put System and System.data in the references in monodevelop on ubuntu , monodevelop do not give me any error only unity3D .i saw other post like this but i did not find a solution
i put an image that describe the situation better
thanks
Why is there a { in front of “public” , should be at the end of that line
because im using the namespace AssemblyCsharp
So the error says, no Data for namespace, maybe there is only data for class? So put your using stuff inside the namespace {}
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tried nothing changed same error . but the problem is only if i use using System.data
the .dll file is alredy there . btw thank you for triyng to help me
Trying my best 
So I just can find that DLL thing, that is causing your error. You sure, you got the right one at the right place? Here is another thread about it and the right dll: missing c# references to System.Data - Unity Engine - Unity Discussions
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tried everything the solution was : put the .dll file in the Asset folder ty for helping asd