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ASP.NET application SQL connection error from production server

During development on my local computer, I am able to connect to the remote (Production) SQL Server with no issues, but when I deploy the application to said production server, I get this error:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 52 - Unable to locate a Local Database Runtime installation. Verify that SQL Server Express is properly installed and that the Local Database Runtime feature is enabled.
I have done I believe all the things suggested to resolve this problem with no success. Please help if you can. Thanks!

I figured out the answer to my issue. I am using ASP.NET Identity and it created it's own connection but I wanted to use my own database. When I deployed my application that connection was broken. Changed the Identity connection to my own database connection and all worked as expected.

SQL Server error: 50 when trying to add .mdf file to App_Data

I was creating a web site project in Visual Studio 2015, created an App_Data folder and tried to add a SQL Server database file.
This error occurred:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(provider: SQL Network Interfaces, error: 50 - Local Database Runtime error occurred. Cannot create an automatic instance. See the Windows Application event log for error details.
I am using Microsoft SQL Server 2014 (v12.0). I checked the connection in SQL Server Configuration Manager, the server connection is enabled, my TCP/IP port is set to 1443, my Firewall is set for the connection as well.
I am able to connect to my server from Visual Studio Tools/Connect to Database Option, it's able to connect either to my server or to a local database. When I test my connection from there, it works.
I also see the connection is enabled and running from server explorer, and when I drag and drop an SQL DataSource Wizard from my ToolBox to an aspx page, the wizard sees the database and is ready to import it as well.
I also have tried double checking the connection under services.msc from cmd and it's all up and running.
Yet, when I want to right click and add a SQL Server database file to my App_Data folder, this error comes up.
I have no idea what is wrong.

Try to use (localdb)\mssqllocaldb as server name to connect to the LocalDB automatic instance. for more information read this article: http://www.sqlcoffee.com/SQLServer2014_0010.htm

Just for documentation (and SQL Express users having the same problems)
1. Check that SQL Express (master-) database exists and is reachable
In Server Explorer => Data Connections => Add Connection
(LocalDb)\mssqllocaldb
(LocalDb)\v12.0
(LocalDb)\v11.0
For further SQL Express problems see:
SQL Network Interfaces, error: 50 - Local Database Runtime error occurred. Cannot create an automatic instance
2. Configure Default Connection in Visual Studio
If you upgraded SQL Express the wrong connection string still resides in the VS configuration
Tools => Options => Databas Tools => Data Connections -> "(LocalDB)\mssqllocaldb"

Which are necessary steps to connect to an Azure SQL database in Visual Studio or SQL Server Management Studio?

I am using Visual Studio 2013 with update 5. I created a SQL database on Azure.
Now I am trying to connect to it in VS and SQL Server Management Studio, but I get this error
Error : Connect to Server
Cannot connect to MyServerName.database.windows.net.
ADDITIONAL INFORMATION:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53)
The network path was not found
Before connecting to Azure SQL I have taken these steps:
Added machine's IP in SQL Azure firewall
Opened port 1433 by adding a new outbound rule in firewall on my local machine
I want know which step I missing in whole process.

Well. This is hapenning because tha address you're using isn't ok to access. Try to connect through the IP, and make sure you're using the PUBLIC IP/DNS. Try to open the firewall on both sides. That's all that I could help you with the information error reported for you. The conection string that you're using is not ok or not accessible.

VS2013 and above has a decent cloud explorer screen, I'd recommend navigating to the resource through that first. You can also use the Server Explorer to navigate to the right resource and open in in SQL Server Object Explorer. That will at least eliminate if it's an issue with your stored credentials.

Cannot access remote SQL server 2012 from C# code in VS2013 after installing SQL server 2012 and setting up related configuration for firewall

In order to clarify my specific problem and add additional details to highlight exactly what I need, I rephrase my previous question.
I need to access a remote SQL server 2012 (version 11) from C# Visual Studio 2013 on my laptop win7.
My connection string is
string MyConnectString = "Data Source=SQLServerName;Initial Catalog=myDatabase;Persist Security Info=True;User ID=myId;Password=Mypassword";
using (System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(MyConnectString))
{
conn.Open(); // **got error here.**
}
The error:
A network-related or instance-specific error occurred while establishing a
connection to SQL Server. The server was not found or was not accessible.
Verify that the instance name is correct and that SQL Server is
configured to allow remote connections. (provider: Named Pipes Provider,
error: 40 - Could not open a connection to SQL Server)
I have searched some possible solutions at:
http://www.sswug.org/articlesection/default.aspx?TargetID=44331>
http://www.connectionstrings.com/sql-server/ (try to resolve the connect string)
https://www.mssqltips.com/sqlservertip/2340/resolving-could-not-open-a-connection-to-sql-server-errors/
http://www.sqlmusings.com/2009/03/11/resolving-a-network-related-or-instance-specific-error-occurred-while-establishing-a-connection-to-sql-server/
http://www.technologycrowds.com/2014/02/could-not-open-connection-to-sql-server.html
http://www.codeproject.com/Questions/335874/A-network-related-or-instance-specific-error-occur
http://www.mcbsys.com/blog/2012/12/connect-to-sql-server-2012-express-over-the-network/
None of them worked for me.
I have installed SQL server 2012 from
http://www.microsoft.com/en-us/download/confirmation.aspx?id=23691
on my laptop.
In SQL server 2012 config manager, I have enabled TCP/IP SQL server browser and named pipes in SQL server network configuration. The all instances of SQL server: MSSQL11 which is the downloaded SQL server 2012 and SQLEXPRESS (it has been installed in my laptop by default) are all "Running".
I have checked the firewall, and created a new inbound and outbound rule for port 1433 for public, private and domain.
Also, in VS2013, tools --> add database, I can connect the remote SQL server by running "test connection" with the same ID and password used in the connection string. But, in VS2013, tools --> add server, I cannot add the remote SQL server. I got error:
**Cannot** **reconnect** to the remote server, make sure the path and machine name are valid.
Why it is "reconnect" ? I have never connected it successfully.
I have also restarted my laptop after setting all of them.
But, I still cannot access the remote SQL server from C# code.
But, I can access a remote SQL server 2008 from the same C# code with the same connect string (just replace the server name and database name) on my laptop.
Any help would be appreciated.

Getting Error logging onto SQLExpress Management Studio

Im getting this error but there is no documentation to fix my problem i just installed SQLExpress 2008 created the instance name SQLExpress choose mixed mode and I choose SQL Server Authentication for authentication user which is KIRK-PC\KIRK(also tried sa with sa I get login failed) and password which is pass. Can some one help do the steps to fix this problem
Cannot connect to localhost.
ADDITIONAL INFORMATION:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476
BUTTONS:
OK

Make sure TCP/IP is turned on. I think the Express edition has it off by default. Go to Configuration Tools > Sql Server Configuration Tools then click Protocols for SQLExpress (or whatever your instance name is) then make sure TCP/IP is enabled.