Common Data Service and Entity Framework

Now that the Common Data Service allows SQL connections to run queries against the entity tables, I thought I might play around with Entity Framework…

Sample Console Application

Let’s quickly build a sample application that uses Entity Framework to consume the CDS TDS endpoint.


  1. Visual Studio Code
  2. .NET Core 3.1 SDK
  3. TDS enabled on CDS environment


Run the following .NET Core CLI command to create a new console application:

dotnet new console -n CdsEfSampleApp

Install the required packages with the following commands:

dotnet add package Microsoft.EntityFrameworkCore.SqlServer
dotnet add package Microsoft.Extensions.Configuration
dotnet add package Microsoft.Extensions.Configuration.Json 
dotnet add package Microsoft.Extensions.DependencyInjection

Add the following files to the project.

Don’t forget to replace the connection string placeholders in the appsettings.json file with your CDS environment details and credentials.

Add the following ItemGroup to the CdsEfSampleApp.csproj project file to ensure the appsettings.json file is always copied to the bin folders when the project is built.

  <Content Include="appsettings.json">


Run the application.

dotnet run

dotnet run

Too lazy to build it yourself?

I’ve created a sample project that is available at The project contains a simple implemetaion of Entity Framework’s DbContext that is used to query the contact table.

The README details the steps to get a copy of the sample code running on your local machine.

Closing Thoughts

Being able to use Entity Framework to query the Common Data Service’s entity tables opens up a lot of new possiblities. As a developer with a CRM development background this is kind of mind blowing and encourages out of the box thinking.

mind blown

All views expressed in my blog are my own and do not represent the opinions of any entity whatsover with which i have been, am now, or will be affiliated.