Unable to fetch the azure key Vault secret in .net sharepoint application

Question

Whenever I am trying to retrieve the azure key vault secret in .net sharepoint application, I am getting the below exception for the below mentioned code . Tried to update all the nugget packages with the expected version but, still unable to troubleshoot the error.

if (!string.IsNullOrEmpty(KeyVaultName) && !string.IsNullOrEmpty(KeyVaultSecret) && !string.IsNullOrEmpty(ManagedIdentityClientId))
{
    var kvUri = $"https://{KeyVaultName}.vault.azure.net";

    var options = new DefaultAzureCredentialOptions()
    {
        ManagedIdentityClientId = ManagedIdentityClientId
    };
    var credential = new DefaultAzureCredential(options);

    var client = new SecretClient(new Uri(kvUri), credential);
    var secret = client.GetSecret(KeyVaultSecret);
   string accountPassword = secret.Value.Value;


}

Below is the exception:

System.IO.FileNotFoundException
  HResult=0x80070002
  Message=Could not load file or assembly 'Azure.Identity, Version=1.10.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8' or one of its dependencies. The system cannot find the file specified.
  Source=ACNAdHocProjectBackup
  StackTrace:
   at ACNAdHocProjectBackup.ACNPSIConfigurator.SetExternalConfigurationData() in D:\MeghaMR\Tools_MSPS2019_ACNAdHocProjectBackup\ACNAdHocProjectBackup\ACNPSIConfigurator.cs:line 453
   at ACNAdHocProjectBackup.ACNPSIConfigurator.ConfigurePSIClients() in D:\MeghaMR\Tools_MSPS2019_ACNAdHocProjectBackup\ACNAdHocProjectBackup\ACNPSIConfigurator.cs:line 102
   at ACNAdHocProjectBackup.Layouts.ACNAdHocProjectBackup.AdHocProjectBackup.configurePSI() in D:\MeghaMR\Tools_MSPS2019_ACNAdHocProjectBackup\ACNAdHocProjectBackup\Layouts\ACNAdHocProjectBackup\AdHocProjectBackup.aspx.cs:line 183
   at ACNAdHocProjectBackup.Layouts.ACNAdHocProjectBackup.AdHocProjectBackup.Page_Load(Object sender, EventArgs e) in D:\MeghaMR\Tools_MSPS2019_ACNAdHocProjectBackup\ACNAdHocProjectBackup\Layouts\ACNAdHocProjectBackup\AdHocProjectBackup.aspx.cs:line 39

  This exception was originally thrown at this call stack:
    ACNAdHocProjectBackup.ACNPSIConfigurator.ConfigurePSIClients() in ACNPSIConfigurator.cs
    ACNAdHocProjectBackup.Layouts.ACNAdHocProjectBackup.AdHocProjectBackup.configurePSI() in AdHocProjectBackup.aspx.cs
    ACNAdHocProjectBackup.Layouts.ACNAdHocProjectBackup.AdHocProjectBackup.Page_Load(object, System.EventArgs) in AdHocProjectBackup.aspx.cs

Answer 1

Hi @M R, MEGHA,

According the error message, it seems you haven't added Azure Identity client library. You could refer to the following command to install the library azure key Vault secret needed.

dotnet add package Azure.Security.KeyVault.Secrets
dotnet add package Azure.Identity

Here is the document for more details of the steps

https://learn.microsoft.com/en-us/azure/key-vault/secrets/quick-create-net?tabs=azure-cli

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