Develop Reference

It takes too long to send transaction to the smart contract which is already deployed. (Nethereum + Unity)

I'm making some dApp using Unity & Nethereum.
I deployed one contract to the Ropsten Test Net using Remix. And I had abi & bytecode of that, so I made Definition & Service C# code using solodity package of VS Code.
I wanted to mint new NFT, and below is the code that I tried.
string url = "my infura - ropsten url";
string privateKey = "private Key of my MetaMask account";
string userAddress = "public address of my MetaMask account";
string contractAddress = "address of deployed contract";
var account = new Account(privateKey);
var web3 = new Web3(account, url);
var service = new MyNFTService(web3, contractAddress);
var mintReceipt = await service.MintRequestAndWaitForReceiptAsync(userAddress, "address of metadata");
But I can't get receipt even after a long time... Why is this happening? I can't get any answer about that, and I just have to wait.
I have tried everything that I can do, like SendTransactionAndWaitForReceiptAsnyc(), SignAndSendTransaction(), and so on.
The version of Nethereum is 4.1.1, and the version of Unity is 2019.4.21f1.
Below is the part of definition code. (mint)
public partial class MintFunction : MintFunctionBase { }
[Function("mint", "uint256")]
public class MintFunctionBase : FunctionMessage
{
[Parameter("address", "user", 1)]
public virtual string User { get; set; }
[Parameter("string", "tokenURI", 2)]
public virtual string TokenURI { get; set; }
}
And below is the part of service code. (mint)
public Task<string> MintRequestAsync(MintFunction mintFunction)
{
return ContractHandler.SendRequestAsync(mintFunction);
}
public Task<TransactionReceipt> MintRequestAndWaitForReceiptAsync(MintFunction mintFunction, CancellationTokenSource cancellationToken = null)
{
return ContractHandler.SendRequestAndWaitForReceiptAsync(mintFunction, cancellationToken);
}
public Task<string> MintRequestAsync(string user, string tokenURI)
{
var mintFunction = new MintFunction();
mintFunction.User = user;
mintFunction.TokenURI = tokenURI;
return ContractHandler.SendRequestAsync(mintFunction);
}
public Task<TransactionReceipt> MintRequestAndWaitForReceiptAsync(string user, string tokenURI, CancellationTokenSource cancellationToken = null)
{
var mintFunction = new MintFunction();
mintFunction.User = user;
mintFunction.TokenURI = tokenURI;
return ContractHandler.SendRequestAndWaitForReceiptAsync(mintFunction, cancellationToken);
}
I am struggle with this problem for five days... Please help me..

I solved it today! (But I didn't use my service code)
In my opinion, the reason why the transaction didn't work is that the miner can't mine my transaction. (Exactly, they can mine, but they didn't because mining other transaction will give them more money.)
In the document of Netherum, they speak nethereum can set the gas price as the average, but I though it didn't work. After I added a code to estimate and set the gas price, SendRequestAndWaitForReceiptAsync() worked very well. (And I could receive transaction hash.)
Below is the code that I used to solve this problem.
var mintHandler = web3.Eth.GetContractTransactionHandler<MintFunction>();
var mint = new MintFunction()
{
User = userAddress,
TokenURI = "Token URI"
};
mint.GasPrice = Web3.Convert.ToWei(25, UnitConversion.EthUnit.Gwei);
var estimate = await mintHandler.EstimateGasAsync(contractAddress, mint);
mint.Gas = estimate.Value;
var mintReceipt = await mintHandler.SendRequestAndWaitForReceiptAsync(contractAddress, mint);
Debug.Log(mintReceipt.TransactionHash);

How to connect to a database using Active directory Login and MultiFactor Authentication (MFA)

I have already configured my Azure SQL Server so that I am Server admin, my account also has MFA enabled. I was trying to follow this documentation but it doesn't mention anything about Active directory with MFA.
I can use my account and MFA to sign into the server fine using SQL Management studio
Initially I tried (based on the new SqlAuthenticationMethod Enum):
SqlConnection con = new SqlConnection("Server=tcp:myapp.database.windows.net;Database=CustomerDB;Authentication=Active Directory Interactive;Encrypt=True;UID=User#User.co.uk"))
Error:
'Cannot find an authentication provider for
'ActiveDirectoryInteractive'.'
I then saw this about accessing SQL via an Azure application But this is not what I want to do.
This SO question talks about connecting without the provider and setting the Driver in the connection string
SqlConnection con = new SqlConnection("DRIVER={ODBC Driver 17 for SQL Server};Server=tcp:myapp.database.windows.net;Database=CustomerDB;Authentication=Active Directory Interactive;Encrypt=True;UID=User#User.co.uk"))
but I get the error:
'Keyword not supported: 'driver'.'
Is there anyway to write a connection string so that when it tries to connect the Microsoft authentication box pops up to walk the user through Multi factor authentication?

To use Azure AD authentication, your C# program has to register as an Azure AD application. Completing an app registration generates and displays an application ID. Your program has to include this ID to connect. To register and set necessary permissions for your application, go to the Azure portal, select Azure Active Directory > App registrations > New registration.
After the app registration is created, the application ID value is generated and displayed.
Select API permissions > Add a permission.
Select APIs my organization uses > type Azure SQL Database into the search > and select Azure SQL Database.
Select Delegated permissions > user_impersonation > Add permissions.
It seems you have already set an Azure AD admin for your Azure SQL Database.
You can also add a user to the database with the SQL Create User command. An example is CREATE USER [] FROM EXTERNAL PROVIDER. For more information, see here.
Below an example on C#.
using System;
// Reference to Azure AD authentication assembly
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using DA = System.Data;
using SC = System.Data.SqlClient;
using AD = Microsoft.IdentityModel.Clients.ActiveDirectory;
using TX = System.Text;
using TT = System.Threading.Tasks;
namespace ADInteractive5
{
class Program
{
// ASSIGN YOUR VALUES TO THESE STATIC FIELDS !!
static public string Az_SQLDB_svrName = "<Your SQL DB server>";
static public string AzureAD_UserID = "<Your User ID>";
static public string Initial_DatabaseName = "<Your Database>";
// Some scenarios do not need values for the following two fields:
static public readonly string ClientApplicationID = "<Your App ID>";
static public readonly Uri RedirectUri = new Uri("<Your URI>");
public static void Main(string[] args)
{
var provider = new ActiveDirectoryAuthProvider();
SC.SqlAuthenticationProvider.SetProvider(
SC.SqlAuthenticationMethod.ActiveDirectoryInteractive,
//SC.SqlAuthenticationMethod.ActiveDirectoryIntegrated, // Alternatives.
//SC.SqlAuthenticationMethod.ActiveDirectoryPassword,
provider);
Program.Connection();
}
public static void Connection()
{
SC.SqlConnectionStringBuilder builder = new SC.SqlConnectionStringBuilder();
// Program._ static values that you set earlier.
builder["Data Source"] = Program.Az_SQLDB_svrName;
builder.UserID = Program.AzureAD_UserID;
builder["Initial Catalog"] = Program.Initial_DatabaseName;
// This "Password" is not used with .ActiveDirectoryInteractive.
//builder["Password"] = "<YOUR PASSWORD HERE>";
builder["Connect Timeout"] = 15;
builder["TrustServerCertificate"] = true;
builder.Pooling = false;
// Assigned enum value must match the enum given to .SetProvider().
builder.Authentication = SC.SqlAuthenticationMethod.ActiveDirectoryInteractive;
SC.SqlConnection sqlConnection = new SC.SqlConnection(builder.ConnectionString);
SC.SqlCommand cmd = new SC.SqlCommand(
"SELECT '******** MY QUERY RAN SUCCESSFULLY!! ********';",
sqlConnection);
try
{
sqlConnection.Open();
if (sqlConnection.State == DA.ConnectionState.Open)
{
var rdr = cmd.ExecuteReader();
var msg = new TX.StringBuilder();
while (rdr.Read())
{
msg.AppendLine(rdr.GetString(0));
}
Console.WriteLine(msg.ToString());
Console.WriteLine(":Success");
}
else
{
Console.WriteLine(":Failed");
}
sqlConnection.Close();
}
catch (Exception ex)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Connection failed with the following exception...");
Console.WriteLine(ex.ToString());
Console.ResetColor();
}
}
} // EOClass Program.
/// <summary>
/// SqlAuthenticationProvider - Is a public class that defines 3 different Azure AD
/// authentication methods. The methods are supported in the new .NET 4.7.2.
/// .
/// 1. Interactive, 2. Integrated, 3. Password
/// .
/// All 3 authentication methods are based on the Azure
/// Active Directory Authentication Library (ADAL) managed library.
/// </summary>
public class ActiveDirectoryAuthProvider : SC.SqlAuthenticationProvider
{
// Program._ more static values that you set!
private readonly string _clientId = Program.ClientApplicationID;
private readonly Uri _redirectUri = Program.RedirectUri;
public override async TT.Task<SC.SqlAuthenticationToken>
AcquireTokenAsync(SC.SqlAuthenticationParameters parameters)
{
AD.AuthenticationContext authContext =
new AD.AuthenticationContext(parameters.Authority);
authContext.CorrelationId = parameters.ConnectionId;
AD.AuthenticationResult result;
switch (parameters.AuthenticationMethod)
{
case SC.SqlAuthenticationMethod.ActiveDirectoryInteractive:
Console.WriteLine("In method 'AcquireTokenAsync', case_0 == '.ActiveDirectoryInteractive'.");
result = await authContext.AcquireTokenAsync(
parameters.Resource, // "https://database.windows.net/"
_clientId,
_redirectUri,
new AD.PlatformParameters(AD.PromptBehavior.Auto),
new AD.UserIdentifier(
parameters.UserId,
AD.UserIdentifierType.RequiredDisplayableId));
break;
case SC.SqlAuthenticationMethod.ActiveDirectoryIntegrated:
Console.WriteLine("In method 'AcquireTokenAsync', case_1 == '.ActiveDirectoryIntegrated'.");
result = await authContext.AcquireTokenAsync(
parameters.Resource,
_clientId,
new AD.UserCredential());
break;
case SC.SqlAuthenticationMethod.ActiveDirectoryPassword:
Console.WriteLine("In method 'AcquireTokenAsync', case_2 == '.ActiveDirectoryPassword'.");
result = await authContext.AcquireTokenAsync(
parameters.Resource,
_clientId,
new AD.UserPasswordCredential(
parameters.UserId,
parameters.Password));
break;
default: throw new InvalidOperationException();
}
return new SC.SqlAuthenticationToken(result.AccessToken, result.ExpiresOn);
}
public override bool IsSupported(SC.SqlAuthenticationMethod authenticationMethod)
{
return authenticationMethod == SC.SqlAuthenticationMethod.ActiveDirectoryIntegrated
|| authenticationMethod == SC.SqlAuthenticationMethod.ActiveDirectoryInteractive
|| authenticationMethod == SC.SqlAuthenticationMethod.ActiveDirectoryPassword;
}
} // EOClass ActiveDirectoryAuthProvider.
} // EONamespace. End of entire program source code.
The example above relies on the Microsoft.IdentityModel.Clients.ActiveDirectory DLL assembly.
To install this package, in Visual Studio, select Project > Manage NuGet Packages. Search for and install Microsoft.IdentityModel.Clients.ActiveDirectory.
Starting in .NET Framework version 4.7.2, the enum SqlAuthenticationMethod has a new value: ActiveDirectoryInteractive.

The only way I have found to login using Active Directory and MFA and cache the token is to use #Alberto's method
I did also find another way which would ask for login credentials every time which is to use this connection string:
OdbcConnection con = new OdbcConnection("Driver={ODBC Driver 17 for SQL Server};SERVER=tcp:myserver.database.windows.net;DATABASE=MyDb;Authentication=ActiveDirectoryInteractive;UID=User#Userco.uk")
Improving the code posted by #alberto. I must say for something so fundamental in the modern world this is unbelievably undocumented. Anyway here's the improved Provider code.
This code also requires you to target .Net Framework 4.7.2 or greater
Firstly follow #alberto's code.. I did find one extra unmentioned step is that you need to also configure a Platform for your app in azure on the authentication tab to look like:
Add these two classes to your project:
ActiveDirectoryAuthProvider
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using System.Data.SqlClient;
namespace SQLAzureConnectivity
{
public class ActiveDirectoryAuthProvider : SqlAuthenticationProvider
{
private string _clientId { get; set; }
private Uri _redirectURL { get; set; } = new Uri("https://login.microsoftonline.com/common/oauth2/nativeclient");
public ActiveDirectoryAuthProvider(string clientId)
{
_clientId = clientId;
}
//https://learn.microsoft.com/en-us/azure/sql-database/active-directory-interactive-connect-azure-sql-db#c-code-example
public override async Task<System.Data.SqlClient.SqlAuthenticationToken> AcquireTokenAsync(System.Data.SqlClient.SqlAuthenticationParameters parameters)
{
AuthenticationContext authContext = new AuthenticationContext(parameters.Authority, new FilesBasedAdalV3TokenCache(".\\Token.dat"));
authContext.CorrelationId = parameters.ConnectionId;
AuthenticationResult result = null;
switch (parameters.AuthenticationMethod)
{
case System.Data.SqlClient.SqlAuthenticationMethod.ActiveDirectoryInteractive:
Console.WriteLine("In method 'AcquireTokenAsync', case_0 == '.ActiveDirectoryInteractive'.");
try
{
result = await authContext.AcquireTokenSilentAsync(parameters.Resource, _clientId);
}
catch (AdalException adalException)
{
if (adalException.ErrorCode == AdalError.FailedToAcquireTokenSilently || adalException.ErrorCode == AdalError.InteractionRequired)
{
result = await authContext.AcquireTokenAsync(parameters.Resource, _clientId, _redirectURL, new PlatformParameters(PromptBehavior.Auto));
//result = await authContext.AcquireTokenAsync(parameters.Resource, _clientId, _redirectURL, new PlatformParameters(PromptBehavior.Auto), new UserIdentifier(parameters.UserId, UserIdentifierType.RequiredDisplayableId));
}
}
break;
case System.Data.SqlClient.SqlAuthenticationMethod.ActiveDirectoryIntegrated:
Console.WriteLine("In method 'AcquireTokenAsync', case_1 == '.ActiveDirectoryIntegrated'.");
result = await authContext.AcquireTokenAsync(parameters.Resource, _clientId, new UserCredential());
break;
case System.Data.SqlClient.SqlAuthenticationMethod.ActiveDirectoryPassword:
Console.WriteLine("In method 'AcquireTokenAsync', case_2 == '.ActiveDirectoryPassword'.");
result = await authContext.AcquireTokenAsync(parameters.Resource, _clientId, new UserPasswordCredential(parameters.UserId, parameters.Password));
break;
default:
throw new InvalidOperationException();
}
return new System.Data.SqlClient.SqlAuthenticationToken(result.AccessToken, result.ExpiresOn);
}
public override bool IsSupported(System.Data.SqlClient.SqlAuthenticationMethod authenticationMethod)
{
return authenticationMethod == System.Data.SqlClient.SqlAuthenticationMethod.ActiveDirectoryIntegrated
|| authenticationMethod == System.Data.SqlClient.SqlAuthenticationMethod.ActiveDirectoryInteractive
|| authenticationMethod == System.Data.SqlClient.SqlAuthenticationMethod.ActiveDirectoryPassword;
}
}
}
FilesBasedAdalV3TokenCache
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using System.IO;
using System.Security.Cryptography;
namespace SQLAzureConnectivity
{
// This is a simple persistent cache implementation for an ADAL V3 desktop application
public class FilesBasedAdalV3TokenCache : TokenCache
{
public string CacheFilePath { get; }
private static readonly object FileLock = new object();
// Initializes the cache against a local file.
// If the file is already present, it loads its content in the ADAL cache
public FilesBasedAdalV3TokenCache(string filePath)
{
CacheFilePath = filePath;
this.AfterAccess = AfterAccessNotification;
this.BeforeAccess = BeforeAccessNotification;
lock (FileLock)
{
this.DeserializeAdalV3(ReadFromFileIfExists(CacheFilePath));
}
}
// Empties the persistent store.
public override void Clear()
{
base.Clear();
File.Delete(CacheFilePath);
}
// Triggered right before ADAL needs to access the cache.
// Reload the cache from the persistent store in case it changed since the last access.
void BeforeAccessNotification(TokenCacheNotificationArgs args)
{
lock (FileLock)
{
this.DeserializeAdalV3(ReadFromFileIfExists(CacheFilePath));
}
}
// Triggered right after ADAL accessed the cache.
void AfterAccessNotification(TokenCacheNotificationArgs args)
{
// if the access operation resulted in a cache update
if (this.HasStateChanged)
{
lock (FileLock)
{
// reflect changes in the persistent store
WriteToFileIfNotNull(CacheFilePath, this.SerializeAdalV3());
// once the write operation took place, restore the HasStateChanged bit to false
this.HasStateChanged = false;
}
}
}
/// <summary>
/// Read the content of a file if it exists
/// </summary>
/// <param name="path">File path</param>
/// <returns>Content of the file (in bytes)</returns>
private byte[] ReadFromFileIfExists(string path)
{
byte[] protectedBytes = (!string.IsNullOrEmpty(path) && File.Exists(path))
? File.ReadAllBytes(path) : null;
byte[] unprotectedBytes = (protectedBytes != null)
? ProtectedData.Unprotect(protectedBytes, null, DataProtectionScope.CurrentUser) : null;
return unprotectedBytes;
}
/// <summary>
/// Writes a blob of bytes to a file. If the blob is <c>null</c>, deletes the file
/// </summary>
/// <param name="path">path to the file to write</param>
/// <param name="blob">Blob of bytes to write</param>
private static void WriteToFileIfNotNull(string path, byte[] blob)
{
if (blob != null)
{
byte[] protectedBytes = ProtectedData.Protect(blob, null, DataProtectionScope.CurrentUser);
File.WriteAllBytes(path, protectedBytes);
}
else
{
File.Delete(path);
}
}
}
}
Then before using a SQLConnection write these two lines:
var provider = new ActiveDirectoryAuthProvider("ClientID from the Azure app you set up earlier");
SqlAuthenticationProvider.SetProvider(SqlAuthenticationMethod.ActiveDirectoryInteractive, provider);
References:
https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/wiki/Token-cache-serialization
https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/wiki/Acquiring-tokens-interactively---Public-client-application-flows#properties-or-platformparameters-constructors-parameters-common-to-most-platforms
https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/wiki/AcquireTokenSilentAsync-using-a-cached-token#recommended-pattern-to-acquire-a-token
https://learn.microsoft.com/en-us/azure/sql-database/active-directory-interactive-connect-azure-sql-db

As mentioned elsewhere, you can use ODBC to connect, without registering your app in the Azure Portal. The interactive prompt will be shown whenever a new connection is added to the pool. Thus, even if you open multiple ODBC connections using the same connection string, you will only see the prompt once within your application lifecycle (or until the connection pool is recycled).
If you don't want to use ODBC, you may also use OLE DB with the MSOLEDBSQL driver, which has similar (or better) performance than the native SQL Client provider (which is deprecated and shouldn't be used anyway):
using System.Data.OleDb;
...
OleDbConnection con = new OleDbConnection("Provider=MSOLEDBSQL;Data Source=sqlserver.database.windows.net;User ID=user#domain.com;Initial Catalog=database;Authentication=ActiveDirectoryInteractive");

This may not be the best place to put this answer, as is it is specific to unit testing sql server and visual studio (community,prof,ent) -- https://youtu.be/OZiTKfNSXh4 # 1:10 -- via mfa interactive using #Dan answer.
The problem is that generating a c#/sql unit test project can be done using interactive connection. But running any unit test will fail because mfa interactive is not supported by SqlClient provider. Below is a work-around.
New file OleDatabaseTestService.cs
using Microsoft.Data.Tools.Schema.Sql.UnitTesting;
using System.Data.OleDb;
namespace [YourNamespace]Tests
{
public class OleDatabaseTestService : SqlDatabaseTestService
{
static OleDatabaseTestService()
{
SetupConext();
}
private static ConnectionContext _contextExecution = null;
private static ConnectionContext _contextPrivileged = null;
public static ConnectionContext ContextExecution { get; set; } = null;
public static ConnectionContext ContextPrivileged { get; set; } = null;
public override ConnectionContext OpenExecutionContext()
{
return ContextExecution;
}
public override ConnectionContext OpenPrivilegedContext()
{
return ContextPrivileged == null ? ContextExecution : ContextPrivileged;
}
// TODO: This can be a written a lot better - please edit this SO if you wish to help
protected static ConnectionContext SetupConext()
{
var context = new ConnectionContext();
context.Provider = OleDbFactory.Instance;
var connection = context.Provider.CreateConnection();
// TODO: Drive the connection string from app.config interactive connection string (wizard creates interactive correctly, but not supported by SqlClient provider)
// var connectionSection = (SqlUnitTestingSection)ConfigurationManager.GetSection("SqlUnitTesting"); // DbConnection connection = new OleDbConnection(
connection.ConnectionString = "Provider=MSOLEDBSQL;Data Source=[azure_database_name].database.windows.net;Initial Catalog=[initial db];User ID=[email];Authentication=ActiveDirectoryInteractive"; // + connectionSection.ExecutionContext.ConnectionString;
connection.Open();
context.Connection = connection;
ContextExecution = context;
ContextPrivileged = context;
return context;
}
}
}
Change to SqlDatabaseSetup.cs
using Microsoft.Data.Tools.Schema.Sql.UnitTesting;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace [YourNamespace]Tests
{
[TestClass()]
public class SqlDatabaseSetup
{
[AssemblyInitialize()]
public static void InitializeAssembly(TestContext ctx)
{
var service = new OleDatabaseTestService();
SqlDatabaseTestClass.TestService = service;
SqlDatabaseTestClass.TestService.DeployDatabaseProject();
SqlDatabaseTestClass.TestService.GenerateData();
}
}
}
Please add a comment on where this would best be moved to. Or if
someone prefers this as a Question/self-Answered on its own (no need
to waste points).

Azure resource management API not showing virtual machine state?

So I've been poking around at read-only api access into azure with the resource management api. Right now I'm focusing on Virtual Machines. I've been using this pre-release package with TokenCredentials:
https://www.nuget.org/packages/Microsoft.Azure.Management.Compute/13.0.1-prerelease
I get a bunch of rich info about my vms but I'm missing a pretty criticle piece of data and that's whether the vm is on or off. I've found a couple of meta data properties like InstanceView and Plan to be null when I expected them to be populated. It may because of how I launched my vms, it may be a unfinished or buggy new package, I can't tell. I was thinking InstanceViews statues would tell me what state the vm is in.
https://msdn.microsoft.com/en-us/library/microsoft.azure.management.compute.models.virtualmachineinstanceview.aspx
So I suppose I have to look elsewhere. I did find this older stackoverflow question that may be what I'm looking for:
azure management libraries virtual machine state
However I'm not sure what dll this GetAzureDeyployment is part of or if it's even TokenCredential compatible. Anyone know whats up?

You can use the following c# code to get the power status of your VM.
using System;
using System.Security;
using Microsoft.Azure.Management.Compute;
using Microsoft.Azure.Management.Compute.Models;
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using Microsoft.Rest;
namespace GetVmARM
{
class Program
{
private static String tenantID = "<your tenant id>";
private static String loginEndpoint = "https://login.windows.net/";
private static Uri redirectURI = new Uri("urn:ietf:wg:oauth:2.0:oob");
private static String clientID = "1950a258-227b-4e31-a9cf-717495945fc2";
private static String subscriptionID = "<your subscription id>";
private static String resource = "https://management.core.windows.net/";
static void Main(string[] args)
{
var token = GetTokenCloudCredentials();
var credential = new TokenCredentials(token);
var computeManagementClient = new ComputeManagementClient(credential);
computeManagementClient.SubscriptionId = subscriptionID;
InstanceViewTypes expand = new InstanceViewTypes();
var vm = computeManagementClient.VirtualMachines.Get("<the resource group name>", "<the VM>", expand);
System.Console.WriteLine(vm.InstanceView.Statuses[1].Code);
System.Console.WriteLine("Press ENTER to continue");
System.Console.ReadLine();
}
public static String GetTokenCloudCredentials(string username = null, SecureString password = null)
{
String authString = loginEndpoint + tenantID;
AuthenticationContext authenticationContext = new AuthenticationContext(authString, false);
var promptBehaviour = PromptBehavior.Auto;
var userIdentifierType = UserIdentifierType.RequiredDisplayableId;
var userIdentifier = new UserIdentifier("<your azure account>", userIdentifierType);
var authenticationResult = authenticationContext.AcquireToken(resource, clientID, redirectURI, promptBehaviour, userIdentifier);
return authenticationResult.AccessToken;
}
}
}
As you can see in this piece of code, I am using InstanceViewTypes which is not available in the document. This is new in the 13.0.1 pre-release version. But yes, if you adding this to your computeManagementClient.VirtualMachines.Get method, you will be able to get extra information for your VM.
Furthermore, I am using vm.InstanceView.Statuses[1] because vm.InstanceView.Statuses[0] is the ProvisioningState. And, I am not sure if the order is always like this, so you may need to loop through the whole status list.

MongoDB MongoClient.GetServer() is Deprecated. What is the new API?

This is my connection string to my database:
private static string ConnectionString = "mongodb://user:password#server:port/";
private static string AuthSource = "?authSource=location";
public static MongoCollection<ItemEntity> GetMyItemCollectionDB = new MongoClient(ConnectionString + DBName + AuthSource)
.GetServer().GetDatabase(DBName).GetCollection<ItemEntity>(CollectionName);
I heard that you can drop the getserver method:
public static MongoCollection<ItemEntity> GetMyItemCollectionDB = new MongoClient(ConnectionString + DBName + AuthSource)
.GetDatabase(DBName)
.GetCollection<ItemEntity>(CollectionName) as MongoCollection<ItemEntity>;
But for that, I get a "null object" error. What's the problem?
EDIT: If it is not that important to use the new API, then just tell me.

To get the MongoServer Instance, I de-compile assembly MongoDB.Driver.dll,
The function GetServer is
[Obsolete("Use the new API instead.")]
public static MongoServer GetServer(this MongoClient client)
{
return
MongoServer.Create(MongoServerSettings.FromClientSettings(client.Settings));
}
So you can try following code
MongoClient client = new MongoClient(ConnectionString + DBName + AuthSource);
MongoServer server = new MongoServer(MongoServerSettings.FromClientSettings(client.Settings));
var yourCollection = server.GetDatabase(DBName).GetCollection<ItemEntity>(CollectionName);
There're 4 ways in version 2.0.0+
MongoDB.Driver.MongoServer.Create(MongoServerSettings)
MongoDB.Driver.MongoServer.WithReadConcern(ReadConcern)
MongoDB.Driver.MongoServer.WithReadPreference(ReadPreference)
MongoDB.Driver.MongoServer.WithWriteConcern(WriteConcern)

I believe you know your second code at last returns an IMongoCollection<ItemEntity>
However, MongoCollection doesn't inherit from IMongoCollection, that's why you get a NULL value in the end.

How can I tell if my program is running on a Domain Controller?

Using C# is there a way to tell if the computer my program is running on is a Domain Controller?

Shorter solution, just check the registry:
const string basename = "HKEY_LOCAL_MACHINE\\";
const string keyname = "SYSTEM\\CurrentControlSet\\Control\\ProductOptions";
string result = (string) Registry.GetValue(basename + keyname, "ProductType", "WinNT");
If the result is "WinNT" it's a client machine. If it's "ServerNT", server, and "LanmanNT" is a Domain Controller.
More info: https://technet.microsoft.com/en-us/library/cc782360%28v=ws.10%29.aspx

Enumerate DCs (snippet below from here) - check for your server name in the resulting list:
public static ArrayList EnumerateDomainControllers()
{
ArrayList alDcs = new ArrayList();
Domain domain = Domain.GetCurrentDomain();
foreach (DomainController dc in domain.DomainControllers)
{
alDcs.Add(dc.Name);
}
return alDcs;
}

Here's a complete function I came up with, to answer the question.
public static bool ThisMachineIsADomainController()
{
Domain domain = Domain.GetCurrentDomain();
string thisMachine = String.Format("{0}.{1}",Environment.MachineName, domain.ToString());
//Enumerate Domain Controllers
List<string> allDcs = new List<string>();
foreach (DomainController dc in domain.DomainControllers)
{
allDcs.Add(dc.Name);
}
return allDcs.Contains(thisMachine);
}