• Hard code the different connection strings and release two versions of your application (one for the 6.2 users and one for the 6.1 users)
• Determine at run time which version of the SalesLogix Provider is installed and then use a connection string formatted for that version.

This sample C# code will return the version of the SalesLogix provider installed.

using Microsoft.Win32;
//...

public enum SalesLogixVersion
{
    Version62, 
    Version61OrPrior
}

public SalesLogixVersion ProviderVersion 
{
    get
    {
        //We'll default to 6.1
        SalesLogixVersion ver = SalesLogixVersion.Version61OrPrior;

        RegistryKey key = null;
        try
        {
            key = Registry.ClassesRoot.OpenSubKey("SLXNetwork.1");
            if (key != null) ver = SalesLogixVersion.Version61OrPrior;

            key = Registry.ClassesRoot.OpenSubKey("SLXOLEDB.1");
            if (key != null) ver = SalesLogixVersion.Version62;
        }
        finally
        {
            if (key != null) key.Close();
        }
        return ver;
    }
}

if (ProviderVersion == SalesLogixVersion.Version62)
    // use a version 6.2 formatted connection string 
else 
    // use a version 6.1 or prior connection string