How to make the connection string visible throughout the solution (across layers)?

I have developed an Asp.net application using three tire architecture and i am reading the connetions string from web.conf file in the UI layer,

My problem is i have to pass the connection string as a parameter in all the function开发者_如何学Cs that are in the Bo layer.

Is there any work around for making the connection string visible throughout the Bo layer so that i dont need to send the connetions string as parameter in all my method calls.

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Include the System.Configuration reference to all projects in which you want to access the connection string and use the following code to access your connection string.

ConfigurationManager.ConnectionString["MyConnection"].ConnectionString

It is advisable to use a helper class to access your connection string.

internal sealed class Utility
{
     public static string MyConnectionString{
          get{
               return ConfigurationManager.ConnectionString["MyConnection"].ConnectionString;
          }
     }
}

This will help you to move your connection string from web.config to any other location in future without breaking your code.