Not able to access SPSite object, throwing exception - sharepoint-2010

Question

try
{
string targetSite = "https://abc.xyz.com/";
using (SPSite scSite = new SPSite(targetSite))
{
lblStatus.Text = "SharePoint Connection - Success";
}
}
catch (Exception ex)
{
lblStatus.Text = "SharePoint Connection - Success";
}
Trying to run above code in visual studio 2012 in console application then it is running fine but if I try to run same in web application project then it is throwing below exception. I am trying this code on server where SharePoint 2010 is installed and using .NET 3.5 Any clue why this is happening!!
System.IO.FileNotFoundException: "The Web application at http://abc.xyz.com could not be found. Verify that you have typed the URL correctly. If the URL should be serving existing content, the system administrator may need to add a new request URL mapping to the intended application."

Answer 1

Here are the most common reasons this error can occur:
The code is executed on a different machine - The SharePoint object model (except the Client API) requires to be run on the SharePoint server itself. It is not possible to run the application on a server which is not within the same SharePoint farm the code is trying to access.
Insufficient Rights on the site collection - The code is executed in context of an account which does not have read permission on the site collection
Incorrect Url being used - Verify that the site works correct in a browser and double check that the server is correct registered in the AAM settings
Incorrect bitness - The SharePoint object model needs to be executed with the same bitness as the operating system. That means you cannot use the SharePoint object model in a 32-bit application if the Operating System and SharePoint are installed as 64-bit version. Ensure to compile the project using the correct bitness (64-bit on a 64-bit machine vs. 32-bit on a 32-bit machine)
Incorrect .NET framework version - Ensure that the project is configured to use .NET 3.5 for SharePoint 2010 and below and .NET 4.0 for SharePoint 2013
Source
Also Microsoft SharePoint is not supported in 32-bit process. Please verify that you are running in a 64-bit executable.