I am working on a c# project. It reference quite a few packages and there are packages referencing other packages. So a namespace used in the program does not necessarily come from a direct reference.
For a specific using statement, is there a way to find out which reference (by reference, I mean the external DLL's/NuGet packages) it is originated from?
Thank you.
For example project reference a Nuget Package called Package1. In Package1 we have namespace called Namespace1. Then Package1 references Package2, which have a namespace called Namespace2.
In your code you could have
using Namespace2;
But how do you know which assembly or Nuget Package Namespace2 is originated from (in this case Package1)?
I'm not aware of a native means in Visual Studio to do this. However, JetBrains ReSharper can do this. Note that a single namespace import isn't tied to a single assembly. A namespace import (using statement) can easily bring types from several different assemblies into scope.
With ReSharper in hand I simply selected the namespace and pressed F12. You can see that System.Collections.Generic is defined in four assemblies referenced by this project.
I tried harlam357's answer in visual studio 2019 but it failed (the image bellow).
1.
Then, I did a trick. I turned the reference in to a comment and found the error line which implements a method belong the namespace. Through the method I got the root reference.
2.
Related
I am trying to use the Dropbox.API code that is listed here:
https://github.com/dropbox/dropbox-sdk-dotnet/tree/master/dropbox-sdk-dotnet/Examples/SimpleTest
I copied their Program.cs into my Program.cs without making other changes to other files in my solution/project.
I am getting
The type or namespace name "WebRequestHandler" could not be found.
Despite having this using statement:
using System.Net.Http;
The help text says to add an assembly reference, but I don't know what I would add.
I tried moving the using System.Net.Http to both inside and outside the class.
I am new to C# and .Net development so expect this to be a really newbie problem.
Have you included a reference to the System.Net.Http.WebRequest DLL? This is where the WebRequestHandler is found, not in System.Net.Http.
See this article on MSDN.
In short, you can add the reference to System.Net.Http.WebRequest DLL by right clicking on the project and doing Add -> Reference. Expect a popup window to appear and then put a checkmark next to System.Net.Http.WebRequest.
I can confirm this lunacy:) You can pull System.Net.Http via NuGet but not System.Net.Http.WebRequest:) System.Net.Http.WebRequest is to be referenced via "Add Reference".
I've ran into this issue a couple times and I'm wondering if anyone has a better solution than trial and error or searching stack overflow.
Lets say we are using some .net class Foo
Foo resides in the Bar.Baz namespace
The following statement
using Bar.Baz;
is not sufficient to compile the program, we are missing an assembly reference. So add a reference to System.Bar.Baz It still doesn't work so after searching the internet I find that I actually have to add a reference to Some.Other.dll and now it compiles.
My question is how do I know what namespace maps to what reference when the usual one doesn't work?
Most recent problem was
The type or namespace name 'DbContext' could not be found Instead of adding a reference to System.Data.Entity I had to install through Nuget.
If it is a .NET framework function, you can just search it on MSDN, and it will tell you in which assembly the class/function exists.
You can also use ReSharper which is a very nice plugin to Visual Studio, and it can help you add assemblies automatically.
If you're using Visual Studio 2013 or higher, one easy way to discover which namespace a class belongs to is using the Peek definition feature. You can easily find it in the right-click context menu.
In the screen below, I used it with KeyValuePair:
Also, take a look at the documentation.
I have 2 projects:
ConstrainedScheduleInterfaces
ConstrainedSchedule that has a folder (Testing) with my class that need the reference, here's the code:
Tests.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using
using NUnit.Framework;
using Ninject;
using ConstrainedScheduleInterfaces;
namespace ConstrainedSchedule.Testing
{
internal static class Configuration
{
...........
}
}
I added the reference to the ConstrainedSchedule project, but the using ConstrainedScheduleInterfaces; is marked red as not found.
Both the project has destination framework set .NET Framework 4.5
Any help? Thanks
Does the project contain a reference to the other project? You can't just add the namespace, the project itself needs an assembly reference to the other project which has that namespace.
In Visual Studio, open the Solution Explorer. Right-click on the ConstrainedSchedule project and select something along the lines of "Add Reference." In the dialog, select project references (depending on the version of Visual Studio it may be a tab or some other interface indicating projects as part of the solution). Select the ConstrainedScheduleInterfaces project and add the reference.
More information here.
For other people who have this problem, who have already added the reference to the dll and have made sure you have the right namespace at the top, I've found another thing that can cause this.
Select-click the file in visual studio and choose properties. In the Advanced part of properties, look for Build Action. Change it to compile if it's not already on that, and try to build again.
There might be another reason: different target frameworks.
My main project had ".NET Framework 4.7.2" and the referenced project (linked from another solution) had ".NET Framework 4.5.1".
Select the project properties and change the target framework.
I was having this issue after renaming a project and namespace due to a naming conflict.
Basically my main project had a reference to a project I made called Common, but then I needed to reference another project called Common that another dev had written. After renaming my project something like SpecificCommon, I was able to have references to both Common and SpecificCommon in my main project. However, all references to SpecificCommon namespace were now broken.
At first I thought this was some problem with the namespace refactor, but it turns out that it was because SpecificCommon and Common both still had the same assembly name (Common.dll). Changing the assembly name in SpecificCommon's properties and rebuilding solved the issue for me.
Inside one solution I have SQLiteDatabaseScope correctly referenced with no errors. On the other solution I'm getting frustrated cause I cannot referenced this dll either using nuget or explicitly referencing dll on the solution one hdd location.
using System.Data.SQLite;
SQLiteDatabaseScope DbScope; // the type or namespace could not be found
any ideas ?
SQLiteDatabaseScope is not part of the SQLite adapter, but is rather from basicallyeverything or another source.
Make sure the correct assembly (from "basicallyeverything") is referenced or the appropriate class source file is included in the project.
Remember that assembly names and namespaces do not need to align in .NET - it's just a nicety when they do.
In C#, I made a ClassLibrary that has one Namespace and one Class.
I saved it and build it.
in other Projects, when i use it, I add it to my references by browsing to the .dll location.
But The Problem is that its name is not showing up in the Intellisense.
i.e when I: using ... my dll doesn't show ..
I'm Importing the library to a ConsoleApp.
both of the App and the library target Framework is .NET Framework 4.0
and I made their Assembly Version 4.0.0.0 so they're the exact same.
is there a setting or something that I'm missing ?
how can i make it pop up ?
I'm using VS2010 Professional
Thank you for your help
Maybe this be usefull, I was having a similar issue, I have a Web project, add the reference to a Class Library by selecting the project, but if I made a change on the class library, I can´t see that change on the intellisense of the Web Project, after try many things, I see that in the recently added reference, the value of the option "Local Copy" was set "True", then I change it to false and everething works!
I had a similar issue but in my case it was a property on the class. If you go to the file properties and look for a Build Action. Somehow mine was set to Content it had to be set to Compile.
I am using Visual Studio 2013. I hope this helps someone else.
Is the namespace for your assembly different than the namespace for your currently open project? I've had times when the current project and an assembly share the same namespace path the intellisense can mess up.
In general, Visual Studio is pretty good about intellisense generation, especially for C#. But sometimes there are some interesting conditions regarding ambiguities, and especially mixing project types where it just doesn't quite work.
Placing your content in the same namespace makes me wonder if you've actually fixed the problem (it may just be autocompleting the namespace in the currently loaded project rather than the assembly), but if it allows you to continue working, then go with it!
Right click on project on which you add reference of your dll/project select menu project dependancies and select/MarkCheckBox for reference project/dll. then it will work fine.
If the class library project had its name changed after creation, then intellisense may fail finding it due to directory issues, I believe.
I created my class with the generic "ClassLibrary1" or whatever, and then later changed the default namespace, class name, and project name inside of VS2017. I closed VS2017 and changed the directory name to match my default namespace, and then re-associated the project file in VS2017, and then re-added the reference in my main project file.
All seems to be fixed now.