Update azure key vault quickstart .net doc

1. Made console app name consistent
2. Removed NuGet package versions
3. Add shell script for environment variables

Author: justinyoo

articles/key-vault/quick-create-net.md

@@ -36,7 +36,7 @@ This quickstart assumes you are running `dotnet`, [Azure CLI](/cli/azure/install
 
 ### Create new .NET console app
 
-In a console window, use the `dotnet new` command to create a new .NET console app with the name `akv-dotnet`.
+In a console window, use the `dotnet new` command to create a new .NET console app with the name `key-vault-console-app`.
 
 ```console
 dotnet new console -n key-vault-console-app
@@ -61,13 +61,13 @@ Build succeeded.
 From the console window, install the Azure Key Vault client library for .NET:
 
 ```console
-dotnet add package Azure.Security.KeyVault.Secrets --version 4.0.0
+dotnet add package Azure.Security.KeyVault.Secrets
 ```
 
 For this quickstart, you will need to install the following packages as well:
 
 ```console
-dotnet add package Azure.Identity --version 1.0.0
+dotnet add package Azure.Identity
 ```
 
 ### Create a resource group and key vault
@@ -138,6 +138,16 @@ setx KEY_VAULT_NAME <your-key-vault-name>
 
 Each time you call `setx`, you should get a response of "SUCCESS: Specified value was saved."
 
+```shell
+AZURE_CLIENT_ID=<your-clientID>
+
+AZURE_CLIENT_SECRET=<your-clientSecret>
+
+AZURE_TENANT_ID=<your-tenantId>
+
+KEY_VAULT_NAME=<your-key-vault-name>
+```
+
 ## Object model
 
 The Azure Key Vault client library for .NET allows you to manage keys and related assets such as certificates and secrets. The code samples below will show you how to create a client, set a secret, retrieve a secret, and delete a secret.