C#: How to Create, Update, Delete and Check (If Exists) an Azure Resource Group in .NET?

csharp

Microsoft Azure Cloud organizes resources by Subscription ID and Resource Groups. In this post, we will find out the methods to check if a given resource group exists, to add or create or update an azure resource group, and delete a resource group.

We can use a Bearer Token credential to authenticate, or we can use other Credentials, such as DefaultCredentials.

Here is a way to obtain the Authorization/Authentication Bearer Token in C# via a Service Principal (requires Client ID, Tenant and Password):

private static string GetBearerToken(string tenant, string clientId, string password)
{
    var cc = new ClientCredential(clientId, string);
    var context = new AuthenticationContext("https://login.windows.net/" + tenant);
    var token = context.AcquireTokenAsync("https://management.azure.com/", cc);
    if (token == null)
    {
        throw new InvalidOperationException("Failed to obtain the JWT Bearer Token");
    }
    return token.Result.AccessToken;
}

With a Valid Bearer (JWT) Token, we can use the ArmClient to apply operations (Add, Create, Update, Delete) to a Microsoft Azure Resource Group.

C# .NET Programmatically Add or Create + Update and Azure Resource Group

If the resource group exists, then it will be updated, otherwise, the resource group will be created.

/// <summary>
/// Create a Resource Group
/// </summary>
/// <param name="subscriptionId">subscriptionId</param>
/// <param name="resourceGroup">resourceGroup</param>
/// <param name="region">region string e.g. ukwest</param>
/// <param name="token">a bearer token</param>
/// <returns></returns>
public static async Task<ResourceGroupResource> CreateResourceGroup(string subscriptionId, string resourceGroup, string region, string token)
{
    // First, initialize the ArmClient and get the default subscription
    var armClient = new ArmClient(new BearerTokenCredential(token));
    // Now we get a ResourceGroup collection for that subscription
    SubscriptionResource subscription = await armClient.GetSubscriptions().GetAsync(subscriptionId);
    ResourceGroupCollection rgCollection = subscription.GetResourceGroups();
    ResourceGroupData rgData = new ResourceGroupData(new AzureLocation(region));
    return (await rgCollection.CreateOrUpdateAsync(WaitUntil.Completed, resourceGroup, rgData)).Value;
}

C# .NET Programmatically Check if an Azure Resource Group Exists

/// <summary>
/// Check if an Resource Group Exists
/// </summary>
/// <param name="subscriptionId">subscription ID</param>
/// <param name="resourceGroup">Name of resourceGroup</param>
/// <param name="token">a bearer token</param>
/// <returns>true or false</returns>
public static async Task<bool> ResourceGroupExists(string subscriptionId, string resourceGroup, string token)
{
    var armClient = new ArmClient(new BearerTokenCredential(token));
    SubscriptionResource subscription = await armClient.GetSubscriptions().GetAsync(subscriptionId);
    return subscription.GetResourceGroups().Exists(resourceGroup).Value;
}

C# .NET Programmatically Delete an Azure Resource Group

/// <summary>
/// Delete a Resource Group
/// </summary>
/// <param name="subscriptionId">subscriptionId</param>
/// <param name="resourceGroupName">resourceGroupName</param>
/// <param name="token">a bearer token</param>
public static async Task DeleteResourceGroup(string subscriptionId, string resourceGroupName, string token)
{
    // First, initialize the ArmClient and get the default subscription
    var armClient = new ArmClient(new BearerTokenCredential(token));
    // Now we get a ResourceGroup collection for that subscription
    SubscriptionResource subscription = await armClient.GetSubscriptions().GetAsync(subscriptionId);
    ResourceGroupResource resourceGroup = await subscription.GetResourceGroups().GetAsync(resourceGroupName);
    await resourceGroup.DeleteAsync(WaitUntil.Completed);
}

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