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Copy file name to clipboardExpand all lines: docs/data-tools/walkthrough-creating-a-simple-wcf-service-in-windows-forms.md
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---
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title: Create WCF Service in .NET Framework Windows Forms
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title: Create a WCF Service in .NET Framework Windows Forms
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description: Create a Windows Communication Foundation (WCF) service in Visual Studio, test the service, and access it from a Windows Forms application.
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ms.date: 06/30/2023
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ms.topic: conceptual
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author: ghogen
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ms.author: ghogen
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manager: mijacobs
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ms.subservice: data-tools
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ms.topic: how-to
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ms.date: 03/19/2025
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dev_langs:
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- VB
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- CSharp
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- WCF, Visual Studio tools for
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- WCF services
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- WCF services, walkthrough
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author: ghogen
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ms.author: ghogen
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manager: mijacobs
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ms.subservice: data-tools
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# Customer intent: As a developer, I want to understand how to create a WCF Service in .NET Framework so that I can access it from a Windows Forms app.
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---
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# Walkthrough: Create a simple WCF service in .NET Framework Windows Forms
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# Walkthrough: Create a WCF service in .NET Framework Windows Forms
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This walkthrough demonstrates how to create a simple Windows Communication Foundation (WCF) service, test it, and then access it from a .NET Framework Windows Forms application.
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This walkthrough demonstrates how to create a Windows Communication Foundation (WCF) service, test it, and then access it from a .NET Framework Windows Forms application.
The WCF tools are not installed with the .NET workload; use the Visual Studio Installer to modify your installation. In the installer, choose **Windows Communication Foundation**under Individual Components. See [Modify Visual Studio](../install/modify-visual-studio.md).
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[Visual Studio](https://visualstudio.microsoft.com/downloads/?cid=learn-onpage-download-cta) with the **Windows Communication Foundation**component installed. To install it:
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## Create a service
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1. Open the **Visual Studio Installer** app, or select **Tools** > **Get Tools and Features** from the Visual Studio menu.
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1. In **Visual Studio Installer**, choose **Modify** next to the version of Visual Studio you want to modify.
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1. Select the **Individual components** tab, and then choose **Windows Communication Foundation** under **Development activities**.
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1. Select **Modify**.
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1. Open Visual Studio.
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For more information, see [Modify Visual Studio workloads, components, and language packs](../install/modify-visual-studio.md).
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2. On the start window, choose **Create a new project**.
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## Create a WCF service
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3. Type **wcf service library**in the search box on the **Create a new project** page. Select either the C# or Visual Basic template for **WCF Service Library**, and then select **Next**.
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To create a WCF service in Visual Studio, follow these steps:
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1. In Visual Studio, select **File** > **New** > **Project** from the menu.
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2. On the **Create a new project** page, enter **wcf service library** in the search box. Select either the C# or Visual Basic template for **WCF Service Library**, and then select **Next**.
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:::image type="content" alt-text="Screenshot that shows how to create a WCF Service Library project in Visual Studio." source="../data-tools/media/vs-2022/create-new-wcf-service-library.png":::
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> [!TIP]
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> If you don't see any templates, you might need to install the **Windows Communication Foundation** component of Visual Studio. Choose **Install more tools and features** to open Visual Studio Installer. Choose the **Individual components** tab, scroll down to **Development activities**, and then select **Windows Communication Foundation**. Click **Modify**.
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> If you don't see any templates, you might need to install the **Windows Communication Foundation** component of Visual Studio. For more information, see [Prerequisites](#prerequisites)
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4. On the **Configure your new project** page, click**Create**.
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3. On the **Configure your new project** page, verify the settings, and then select**Create**.
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> [!NOTE]
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> This creates a working service that can be tested and accessed. The following two steps demonstrate how you might modify the default method to use a different data type. In a real application, you would also add your own functions to the service.
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This step creates a working WCF service that you can test and access. The following steps demonstrate how to modify the default method to use a different data type. In a real application, you'd also add your own functions to the service.
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5. In **Solution Explorer**, double-click **IService1.vb** or **IService1.cs**.
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4. In **Solution Explorer**, double-click **IService1.cs** or **IService1.vb** in your WCF service library project, depending on which type of project you created.
1. In the **Request** box of the **GetData** tab, select the **Value** field and enter **Hello**.
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3. In the **Request** box, select the **Value** field and type `Hello`.
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:::image type="content" alt-text="Screenshot that shows the Value field in the GetData tab." source="../data-tools/media/wcf5.png":::
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1. Select the **Invoke** button. If a **Security Warning** dialog box appears, select **OK**.
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4. Click the **Invoke** button. If a **Security Warning** dialog box appears, click **OK**. The result displays in the **Response** box.
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The result displays in the **Response** box.
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:::image type="content" alt-text="Screenshot that shows the result displayed in the Response box in the GetData tab." source="../data-tools/media/wcf6.png":::
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5. On the **File** menu, click**Exit** to close the test form.
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1. On the **File** menu, select**Exit** to close the test form.
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## Access the Service
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## Access the WCF service
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After you create and test the WCF service, you can reference it from a project and use it to build a client application.
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### Reference the WCF service
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1. On the **File** menu, point to **Add > New Project**. Choose **Windows Forms App (.NET Framework)** project.
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To reference the WCF service from a project, follow these steps:
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1. Select **File** > **Add** > **New Project**.
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1. In the **Add a New Project** window, choose either a C# or Visual Basic **Windows Forms App (.NET Framework)** project. Select **Next**, and then **Create** to create the project.
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1.Right-click on the project node, and click**Add > Service Reference**. The**Add Service Reference** dialog box appears.
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1.In **Solution Explorer**, right-click the project node of the new project, and select**Add** >**Service Reference**.
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1. In the **Add Service Reference** dialog box, click **Discover**.
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The **Add Service Reference** dialog box appears.
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1. Select **Discover**.
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:::image type="content" alt-text="Screenshot that shows the Add Service Reference dialog box." source="../data-tools/media/vs-2022/add-service-reference-dialog-box.png":::
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**Service1** displays in the **Services** pane.
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1.Click**OK** to add the service reference.
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1.Select**OK** to add the service reference.
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### Build a client application
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1. In **Solution Explorer**, double-click **Form1.vb** or **Form1.cs** to open the Windows Forms Designer if it is not already open.
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To use a WCF service reference to build a client application, follow these steps.
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1. In **Solution Explorer**, double-click **Form1.cs** or **Form1.vb** in the Windows Forms app.
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1. Open the **Toolbox** by clicking on **View** > **Toolbox** (or **Ctrl**+**Alt**+**X** on the keyboard).
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The form opens in Windows Forms Designer.
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1.From the **Toolbox**, drag a `TextBox` control, a `Label` control, and a `Button` control onto the form.
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1.Open the **Toolbox** by selecting **View** > **Toolbox** from the menu, or press **Ctrl**+**Alt**+**X** from the keyboard.
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:::image type="content" alt-text="Screenshot showing adding controls to the form." source="../data-tools/media/vs-2022/windows-communication-foundation-client-app.png" lightbox="../data-tools/media/vs-2022/windows-communication-foundation-client-app.png":::
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1. From the **Toolbox**, drag a **TextBox** control, a **Label** control, and a **Button** control onto the form.
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1. Double-click the `Button`, and add the following code in the `Click` event handler:
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:::image type="content" alt-text="Screenshot that shows how to add controls to the client application form." source="../data-tools/media/vs-2022/windows-communication-foundation-client-app.png" lightbox="../data-tools/media/vs-2022/windows-communication-foundation-client-app.png":::
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1. Double-click the **Button** control, and add the following code in the `Click` event handler:
1. In **Solution Explorer**, right-click the project node (for example, **WindowsFormsApp1**), and click**Set as StartUp Project**.
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1. In **Solution Explorer**, right-click the project node (for example, **WindowsFormsApp1**), and select**Set as StartUp Project**.
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1. Press **F5** to run the project. Enter some text and click the button. The label displays "You entered:" and shows the text that you entered.
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1. Press **F5** to run the project. Enter some text and select the button. The label displays **You entered:**, followed by your text.
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:::image type="content" alt-text="Screenshot that shows the result displayed in the running client application form." source="../data-tools/media/vs-2022/windows-forms-app.png":::
Copy file name to clipboardExpand all lines: docs/extensibility/how-to-diagnose-ui-delays-caused-by-extensions.md
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PerfView has detailed guidance under the **Help** menu that you can use to identify performance bottlenecks in your code. Additionally, the following links provide more information on how to utilize Visual Studio threading APIs to optimize your code:
You can also use the new Visual Studio static analyzers for extensions (NuGet package [here](https://www.nuget.org/packages/microsoft.visualstudio.sdk.analyzers)), that provide guidance on best practices for writing efficient extensions. See a list of [VSSDK analyzers](https://github.com/Microsoft/VSSDK-Analyzers/blob/main/doc/index.md) and [threading analyzers](https://github.com/Microsoft/vs-threading/blob/main/doc/analyzers/index.md).
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You can also use the new Visual Studio static analyzers for extensions (NuGet package [here](https://www.nuget.org/packages/microsoft.visualstudio.sdk.analyzers)), that provide guidance on best practices for writing efficient extensions. See a list of [VSSDK analyzers](https://github.com/Microsoft/VSSDK-Analyzers/blob/main/doc/index.md) and [threading analyzers](https://github.com/microsoft/vs-threading/blob/main/docfx/analyzers/index.md).
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> [!NOTE]
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> If you are unable to address the unresponsiveness due to dependencies you do not have control over (for example, if your extension has to call synchronous VS services on the UI thread), we would like to know about it. If you are a member of our Visual Studio Partner program, you can contact us by submitting a developer support request. Otherwise, use the 'Report a Problem' tool to submit your feedback and include `"Extension UI Delay Notifications"` in the title. Please also include a detailed description of your analysis.
| Available as | - [Built-in by default in all workloads](visual-studio-github-copilot-install-and-states.md#get-github-copilot-for-visual-studio-2022-version-1710-or-later) & available through the Visual Studio Installer in Visual Studio version 17.10 and later <br/> - [Downloadable extensions](visual-studio-github-copilot-install-and-states.md#get-github-copilot-for-visual-studio-2022-versions-178-to-179) in Visual Studio versions 17.8 & 17.9| Built-in by default in most [workloads](../install/modify-visual-studio.md#change-workloads-or-individual-components) & available through the Visual Studio Installer |
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| Available as |[Built-in by default in all workloads](visual-studio-github-copilot-install-and-states.md#install-using-the-visual-studio-installer) & available through the Visual Studio Installer in Visual Studio version 17.10 and later <br/>| Built-in by default in most [workloads](../install/modify-visual-studio.md#change-workloads-or-individual-components) & available through the Visual Studio Installer |
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| Subscription-based |**Yes** <br/>[Learn more](https://docs.github.com/en/billing/managing-billing-for-github-copilot/about-billing-for-github-copilot)| No |
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| User interface | Inline <br/>Chat window | Inline |
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