Why am I getting error CS0246 The type or namespace name could not be found

Question

I am using Snarl C  API to send notifications to snarl   Now I have saved the content of above url in a file named SnarlNetwork cs and the content of my test cs file are   using SnarlNetworkProtocol  using System  class test       public static void Main String   args                SNP snarl object   new SNP            string hostname    localhost           string hostport    9887           string appName    Spotify            bool val   snarl object register hostname  hostport  appName            if  val    true                        string title    hello               string message    world               string timeout    5               bool newval   snarl object notify hostname  hostport  appName  null  title  message  timeout                if  newval    true                                Console WriteLine  sucessfull                                        Now when I try to compile my test cs file using csc test cs I get the following error   C  Users Noob csharp gt csc test cs Microsoft  R  Visual C  2008 Compiler version 3 5 30729 4926 for Microsoft  R   NET Framework version 3 5 Copyright  C  Microsoft Corporation  All rights reserved   test cs 1 7   error CS0246  The type or namespace name  SnarlNetworkProtocol  could not be found  are you missing a using directive or an assembly reference     So  what am I doing wrong here because according to me I am not missing any using directive

User · Answer

I have resolved this problem by adding the reference to System Web

User · Answer

I had this error on a MVC Project  And after a long research i found out that the  cs file containing some of the classes i referenced in the main project had a Build Actions set to  Content        After changing it  Content -  Compile  the error disappeared

User · Answer

This is the problem   C  Users Noob csharp gt csc test cs   You haven t added a reference to the DLL  You need something like   C  Users Noob csharp gt csc test cs  r SnarlNetwork dll    or whatever the assembly is called    Alternatively  if you haven t got it as a separate library  just compile both files   C  Users Noob csharp gt csc test cs SnarlNetwork cs   If you haven t compiled an assembly but want to  you can use   csc  target library  out SnarlNetwork dll SnarlNetwork cs  csc Test cs  r SnarlNetwork dll    In fact  specifying the output file is unnecessary in this particular case  but it s still clearer

User · Answer

It might be due to  client profile  of the  NET Framework  Try to use the  full version  of  NET

User · Answer

i also faced same problem   Reason  why i faced this error is   rather then creating new partial view   i have created class and then renamed its extension from   cs  to   cshtml     Solution   Just delete that rename view and re-create proper partial full view  it will work fine after that

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I had a similar problem after first pulling and starting a new solution  It was fixed in visual studio by first cleaning the project  Then restoring the packages  When I built again  there were no more type or namespace errors

User · Answer

On the Solution Explorer tab right click and select Properties Resolve this issue by updating the Target Framework in the project application settings     For instance  In my case the project was compiling with  net framework version 4 5 1 but the dll which were referenced were compiled with the version 4 6 1  So have updated the my project version  I hope it works for you

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I also got this error due to a missing reference  The reason I did not notice is because Resharper offers to add a using and a reference  Adding the using succeeds  but it s highlighted grey   syntax highlighting of missing classes works  sometimes   but adding the reference fails silently   When manually adding the reference an error pops up  explaining why adding the reference fails  circular reference    Resharper did not pass this error on to the GUI

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Edit  Oh ignore me  you re not using Visual Studio   Have you added the reference to your project   As in this sort of thing

User · Answer

Check your Web Config and find namespace     you can remove or if you need it you must create new

User · Answer

I resolved this by making sure my project shared the same  Net Framework version as the projects libraries it depended on   It turned out the libraries  projects within the solution  used  Net 4 6 1 and my project was using 4 5 2

User · Answer

This usually happens to me when I have a using statement but have forgotten to reference the assembly that defines the namespace   But in your case  as the namespace is defined in a file in your project  you have forgotten to tell the compiler about the snarlnetwork cs file   See csc compiler examples

User · Answer

I was using  NET Framework 4 5 but my new library had  NET Framework 4 5 2 and I got the same issue when I tried to build  I solved it by updating my project from 4 5 to 4 5 2  same as my library

User · Answer

I had the same issue when I clone my project from Git and directly build the solution first time  Instead of that go to the local repository in file explorer and double click the solution file   sln  solved my issue

User · Answer

most of the problems cause by  NET Framework  So just go to project properties and change  Net version same as your reference dll    Done     Hope it s help

User · Answer

I had the same error when used cs file was located inside project folder  but did not referenced from  csproj of parent project   Intellisence see this file inside project folder  but compiler does not see it  because of missing reference in  csproj

[c#] Why am I getting error CS0246: The type or namespace name could not be found?

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