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Understanding and Creating Your First Dynamics 365 Plugin: A Comprehensive Guide for Beginners

Understanding and Creating Your First Dynamics 365 Plugin: A Comprehensive Guide for Beginners

Title: Crafting a Simple Dynamics 365 Plugin: A Beginner’s Guide


Microsoft Dynamics 365 represents a suite of intelligent business applications that aids organisations in managing their operations more efficiently and delivering enhanced customer service. One standout feature is Dynamics 365’s plugin architecture which enables customisations to extend its software’s capabilities. This article will guide you step-by-step in writing a simple Dynamics 365 plugin, ensuring you harness its full potential.

Understanding Dynamics 365 Plugin

A Dynamics 365 plugin is a custom business logic component that modifies standard behaviour of the system. Plugins are written in either C# or VB.NET and can run synchronously or asynchronously. They provide a flexible way to build custom features and integrate external systems, providing an edge in your business processes.

Let’s delve into the practical aspect of creating a Dynamics 365 plugin.


1. Visual Studio – Download and install Visual Studio. Ensure you have the .NET Framework 4.6.2 or later.
2. Dynamics 365 SDK – Download Dynamics 365 SDK from Nuget. It provides libraries and tools required to develop plugins.
3. Dynamics 365 instance – You require an accessible instance to test the plugin.

Steps To Write a Simple Dynamics 365 Plugin

1. Create a New Project: Open Visual Studio, go to File > New > Project. Select Class Library (.NET Framework), name your project, and click OK.

2. Install Microsoft.CrmSdk.CoreAssemblies: Go to Tools > Nuget Package Manager > Package Manager Console, then type: Install-Package Microsoft.CrmSdk.CoreAssemblies.

3. Build Your Plugin: Inherit IPlugin interface from Microsoft.Crm.Sdk.Messages namespace in your class. Implement its Execute method that carries out the plugin’s operation. For instance, create a pre-operation plugin to validate an account’s credit limit before saving.


public class ValidateCreditLimitPlugin : IPlugin
public void Execute(IServiceProvider serviceProvider)
var context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));
if (context.InputParameters.Contains(“Target”) && context.InputParameters[“Target”] is Entity entity)
if (entity.LogicalName != “account”) return;
var creditLimit = (Money)entity.Attributes[“creditlimit”];

if (creditLimit.Value > 1000000)
throw new InvalidPluginExecutionException(“Credit Limit cannot exceed £1,000,000.”);

4. Sign your Assembly: Go to Project > Properties > Signing, check ‘Sign the assembly’, select ‘‘ from dropdown list, enter Key Name, and password. Click OK.

5. Build Solution: Click on Build > Build Solution to generate the DLL file.

6. Register Your Plugin: Use Plugin Registration Tool in SDK to register your plugin with Dynamics 365. Connect the tool with your Dynamics 365 instance, then click on ‘Register > Register New Assembly’ and upload your DLL file.

7. Test: After successfully registering, test your plugin. In this example, try to set an account’s credit limit over £1,000,000. The system should prevent you from saving due to the plugin.

Using plugins amplifies the capabilities of Dynamics 365, facilitating a personalised CRM experience. However, be mindful of the potential impact on system performance while implementing complex plugins.


Writing a simple plugin for Dynamics 365 might seem daunting initially, but once you grasp the basics, you’ll appreciate the flexibility it offers. It empowers you to tailor the CRM system to your specific business needs seamlessly. Remember, practice makes perfect. So, why not give it a go today and unlock a new level of proficiency in CRM customisation?

Happy coding!

Include Keywords: Dynamics 365, Plugin Architecture, Custom Business Logic, Visual Studio, Dynamics 365 SDK, .NET Framework, IPlugin Interface, Pre-Operation Plugin, Plugin Registration Tool, CRM Customisation.

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