Develop Reference

error CS0234: The type or namespace name 'Azure' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)

I have installed Microsoft.azure.data nuget package in visual studio but I m getting below error-
Program.cs(1,17): error CS0234: The type or namespace name 'Azure' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?) below is my program code -
using Microsoft.Azure.Kusto.Data;
using System;
namespace LensDashboradOptimization
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
//var clusterUrl = "https://mykusto.kusto.windows.net";
// replace 'WithAadUserPromptAuthentication' with your preferred method of authentication
//var kcsb = new Kusto.Data.KustoConnectionStringBuilder(clusterUrl);
//Console.WriteLine(kcsb);
// Read the first row from reader -- it's 0'th column is the count of records in MyTable
// Don't forget to dispose of reader when done.
var client = Kusto.Data.Net.Client.KustoClientFactory.CreateCslQueryProvider("https://help.kusto.windows.net/Samples;Fed=true");
var reader = client.ExecuteQuery("StormEvents | count");
Console.WriteLine(reader);
}
}
}

Install Microsoft.Azure.Kusto.Data nuget. then it compiles for me. It does give me authentication errors but not assembly reference errors.
using Kusto.Data.Net.Client;
namespace ConsoleApp2
{
class Program
{
static void Main(string[] args)
{
var client = KustoClientFactory.CreateCslQueryProvider("https://help.kusto.windows.net/Samples");
var reader = client.ExecuteQuery("StormEvents | count");
}
}
}

Dynamic c# compiler in Xamarin.Forms not finding type or namespace

I've got a Xamarin.Forms app to dynamically compile c# code on a button press, but I get errors in the code.
This is the code for the button being pressed:
{
string text = ((Editor)sender).Text;
var csc = new CSharpCodeProvider(new Dictionary<string, string>() { { "CompilerVersion", "v3.5" } });
var parameters = new CompilerParameters(new[] { "mscorlib.dll", "System.Core.dll" }, "foo.exe", true);
parameters.GenerateExecutable = true;
CompilerResults results = csc.CompileAssemblyFromSource(parameters, text);
results.Errors.Cast<CompilerError>().ToList().ForEach(error => string errors = error.ErrorText;
}
and I am using:
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
With the XAML being this:
<Button x:Name="compilebutton" Text="Compile" Clicked="oncompile" />
The type or namespace name 'CompilerParameters' could not be found (are you missing a using directive or an assembly reference?)
The type or namespace name 'CompilerResults' could not be found (are you missing a using directive or an assembly reference?)
The type or namespace name 'CompilerError' could not be found (are you missing a using directive or an assembly reference?)
I have tested this without Xamarin.Forms in a Console Application and it worked fine, i'm not sure what the issue is, any help would be appreciated, thanks!

Cannot compile .cs file which call another class member or using other namespace than "System"

I just begin a test with CoreCRL. I could compile and run the HelloWorld.cs example. But when I add some extra function to make it more really, this is my code:
using System;
namespace BenchMark
{
class Program
{
/*******************************************************************************/
public static void Main()
{
try
{
Console.WriteLine("BenchMark.exe C# runned");
string[] param = System.Environment.GetCommandLineArgs();
var benchMarkType = param[1];
switch (benchMarkType)
{
case "alg":
PhepToanDaiSo p = new PhepToanDaiSo();
p.callAlg(param);
break;
case "method":
ThuatToanBiz.callMethod(param);
break;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
/*************************************************/
}
}
All the class and calling is valid, I can run this program successfully. But when I try to compile it use CoreCLR, with syntax:
E:\Learning\Viegrid\Native\SVN\trunk\BenchMark\BenchMark>csc /nostdlib /noconfig /r:packages\System.Runtime.4.0.20-beta-22703\lib\contract\System.Runtime.dll /r:packages\System.Console.4.0.0-beta-22703\lib\contract\System.Console.dll /out:runtime\BenchMark.exe Program.cs
Microsoft (R) Visual C# Compiler version 4.6.1055.0 for C# 5 Copyright
(C) Microsoft Corporation. All rights reserved.
I got the error:
Program.cs(13,41): error CS0234: The type or namespace name 'Environment' does not exist in the namespace 'System' (are
you missing an assembly reference?)
Program.cs(18,25): error CS0246: The type or namespace name 'PhepToanDaiSo' could not be found (are you missing a using
directive or an assembly reference?)
Program.cs(18,47): error CS0246: The type or namespace name 'PhepToanDaiSo' could not be found (are you missing a using
directive or an assembly reference?)
Program.cs(22,25): error CS0103: The name 'ThuatToanBiz' does not exist in the current context
I did something wrong? Or coreclr is only can't work with any namespace except "System"?

Unity 4.6 C#: The type or namespace name `IOS' does not exist in the namespace `GooglePlayGames'

I have a game developed for iOS as well as android, Here is the code which suddenly started giving an error "Assets/GooglePlayGames/Platforms/PlayGamesClientFactory.cs(31,40): error CS0234: The type or namespace name IOS' does not exist in the namespaceGooglePlayGames'. Are you missing an assembly reference?
"
Here is the code:
using System;
using UnityEngine;
using UnityEngine.SocialPlatforms;
using GooglePlayGames.BasicApi;
namespace GooglePlayGames {
internal class PlayGamesClientFactory {
internal static IPlayGamesClient GetPlatformPlayGamesClient() {
if (Application.isEditor) {
return new GooglePlayGames.BasicApi.DummyClient();
}
#if UNITY_ANDROID
return new GooglePlayGames.Android.AndroidClient();
#elif UNITY_IPHONE
return new GooglePlayGames.IOS.IOSClient();
#else
return new GooglePlayGames.BasicApi.DummyClient();
#endif
}
}
}
Error is on the line:
return new GooglePlayGames.IOS.IOSClient();

The use of the platform dependent define "UNITY_IPHONE" is marked as Deprecated.
Unity documentation mentions UNITY_IOS as the new PLatform dependent define for the iOS platform.
http://docs.unity3d.com/Manual/PlatformDependentCompilation.html
The line of GooglePlayGames.IOS.IOSClient(); should be correct. ( not test in my code but the corresponding github archive shows the class in that place.)

Include using GooglePlayGames.IOS; at the top of your file.

Farseer ContactListener is not working

I'm using Farseer in my XNA project, but I have some trouble with the ContactListener. I created a class for my ContactListener but I always get these two error messages and I don't know how to fix the problems.
The type or namespace name 'ContactListener' could not be found (are you missing a using directive or an assembly reference?)
The type or namespace name 'ContactImpulse' could not be found (are you missing a using directive or an assembly reference?)
What is wrong with my ContactListener class?
class MyContactListener: ContactListener
{
void BeginContact(Contact contact)
{ /* handle begin event */ }
void EndContact(Contact contact)
{ /* handle end event */ }
void PreSolve(Contact contact, ref Manifold oldManifold)
{
Fixture fixtureA = contact.FixtureA;
Fixture fixtureB = contact.FixtureB;
if (fixtureB.CollisionCategories == Category.Cat10)
{
contact.Enabled = false;
}
}
void PostSolve(Contact contact, ref ContactImpulse impulse)
{ /* handle post-solve event */ }
}

Try this:
Open VS
Go to the Solution Explorer window
Search for a folder called References and right click it
Select Add Reference...
look for the Farseer assembly and add it
And try adding these in code:
using FarseerPhysics.Collision.Shapes;
using FarseerPhysics.Common;
using FarseerPhysics.Dynamics;
using FarseerPhysics.Dynamics.Contacts;
using FarseerPhysics.Factories;
using FarseerPhysics.TestBed.Framework;
using Microsoft.Xna.Framework;