How to send Firebase notifications in C#

This post explains how to send mobile notifications from Firebase in C# with Firebase Admin SDK

Introduction

 

This blog post explains how to send FCM Push notifications as a Firebase admin. There are many Google Firebase tutorials available on the subject, but they often not clear and step-by-step. As such, here is my code, I hope this helps everyone.

 

1. Add the Firebase admin .net SDK by NuGet

 

 

2. Get a Firebase service account key from Project Setting -> Service account -> Click on generate new private key.

3. Initialize the Firebase Admin SDK in startup.cs

/* - - - - - - - - - - FCM Admin SDK - - - - - - - - - - - - - - - - */
public IServiceProvider ConfigureServices(IServiceCollection services)
var googleCredential = _hostingEnvironment.ContentRootPath;
 var filePath = Configuration.GetSection("GoogleFirebase")["fileName"];
 googleCredential = Path.Combine(googleCredential, filePath);
 var credential = GoogleCredential.FromFile(googleCredential);
 FirebaseApp.Create(new AppOptions()
 {

 Credential = credential
 });
}

4. Send Notification

public virtual async Task<string> SendNotification(List<string> clientToken, string title, string body)
 {
 var registrationTokens = clientToken;
 var message = new MulticastMessage()
 {
 Tokens = registrationTokens,
 Data = new Dictionary<string, string>()
 {
 {"title", title},
 {"body", body},
 },
 };
 var response = await FirebaseMessaging.DefaultInstance.SendMulticastAsync(message).ConfigureAwait(true);
 return "";
 }

That's it.