how to change namespace of entire project?

I'm modifying demo application from this article: http://msdn.microsoft.com/en-us/magazine/dd419663.aspx

I need to update all files to use my namespace, for example now file located here:

MySolution\MyApp\DemoApp\ViewModel\MainWindowViewModel.cs

is using such namespace:

namespace DemoApp.ViewModel
{
/// <summary>
/// The ViewModel for the application's main window.
/// </summary>
public class MainWindowViewModel : WorkspaceViewModel

I need to move file here (remove DemoApp folder):

MySolution\MyApp\ViewModel\MainWindowViewModel.cs

and also to use right namespace:

namespace MyApp.ViewModel
{
....

how to do that in visual studio 2010?

Update ok here is possible duplicate https://stackoverflow.com/questions/2871314/visual-studio-change-project-namespace Now I know how to change the namespace of the project, but how to move files on the file system? (get rid of "DemoApp" folder)

Go to someplace the namespace is declared in one of your files. Put the cursor on the part of the namespace you want to change, and press F2. This should rename the namespace in every file. At least, it worked in my little demo project I created to test this answer!

Depending on your VS version, the shortcut might also be Ctrl-R,Ctrl-R.

I imagine a simple Replace in Files (Ctrl+Shift+H) will just about do the trick; simply replace namespace DemoApp with namespace MyApp. After that, build the solution and look for compile errors for unknown identifiers. Anything that fully qualified DemoApp will need to be changed to MyApp.

Just right click the solution, go to properties, change "default namespace" under 'Application' section.

Ctrl+Shift+H not the real solution.

You can use Resharper to change your all namespace definitions in your solution. This is the best way I tried before.

https://www.jetbrains.com/resharper/features/code_refactoring.html

You can use ReSharper for namespace refactoring. It will give 30 days free trial. It will change namespace as per folder structure.

Steps:

1. Right click on the project/folder/files you want to refactor.

2. If you have installed ReSharper then you will get an option Refactor->Adjust Namespaces.... So click on this.

It will automatically change the name spaces of all the selected files.

You can use CTRL+R, CTRL+R or for complex namespace changes use this tool https://marketplace.visualstudio.com/items?itemName=vs-publisher-599079.FixNamespace

I have gone through the folder structure with a tool called BareGrep to ensure I have got all of the namespace changes. Its a free tool that will allow you to search over the files in a specified file structure.

I tried everything but I found a solution which really works. It creates independed solution with a new namespace name an so on.

1. In main form find namespace name -> right click -> Refactor -> Rename and select a new name. Check all boxes and click OK.

2. In the solution explorer rename solution name to a new name.

3. In the solution explorer rename project name to a new name.

4. Close VS and rename folder (in total commander for example) in the solution folder to a new name.

5. In .sln file rename old name to a new name.

6. Delete old .suo files (hidden)

7. Start VS and load project

8. Project -> properties -> change Assembly name and default namespace to a new name.

I know its quite late but for anyone looking to do it from now on, I hope this answer proves of some help. If you have CodeRush Express (free version, and a 'must have') installed, it offers a simple way to change a project wide namespace. You just place your cursor on the namespace that you want to change and it shall display a smart tag (a little blue box) underneath namespace string. You can either click that box or press Ctrl + keys to see the Rename option. Select it and then type in the new name for the project wide namespace, click Apply and select what places in your project you'd want it to change, in the new dialog and OK it. Done! :-)

When I wanted to change namespace and the solution name I did as follows:

1. changed the namespace by selecting it and renaming it and I did the same with solution name
   
2. clicked on the light bulb and renamed all the instances of old namespace
   
3. removed all the projects from the solution
   
4. closed the visual studio
   
5. renamed all the projects in windows explorer
   
6. opened visual studio and added all the projects again
   
7. rename namespaces in all projects in their properties
   
8. removed bin folder (from all projects)
   
9. build the project again
   

That worked for me without any problems and my project had as well source control. All was fine after pushing those changes to the remote.

In asp.net is more to do, to get completely running under another namespace.

• Copy your source folder and rename it to your new project name.

• Open it and Replace all by Ctrl + H and be sure to include all Replace everything

• Press F2 on your Projectname and rename it to your new project name

• go to your project properties and adjust it, coz everything has gone and you need to make a new Debug Profile Profile to Create

• All dependencies have now an exclamation mark - restart visual studio

• Clean your solution and Run it and it should work :)

When renaming a project, it's a simple process

• Rename your project
• Edit project properties to have new Default Namespace value
• Find/Replace all "namespace OLD" and "using OLD" statements in your solution
• Manually edit .sln file in text editor and replace your old project name in the directory structure with your new project name.
• Reload solution when VS prompts

In VS 2019 you can rename your namespace using the following steps

1. Place your cursor in the namespace name.
2. Press Ctrl+. to trigger the Quick Actions and Refactorings menu.
3. Select Change namespace to . For more refer to Microsoft documentation

Anyone trying it out on VS Code, Use the typical Rename option, which will update all the namespace usages across, and if the project name is changed, you will have to go inside each .csproj and replace the new project name.

Don't forget to run dotnet restore, then only it will stop showing build issues.