StringInterpolation-before.cs

public void GetData(int customerId, string businessCode)
{
    StringBuilder query = new StringBuilder();

    query.AppendLine("SELECT c.*");
    query.AppendLine("FROM   Customer c");
    query.AppendLine("INNER JOIN Business b ON c.BussinessCode = b.BussinessCode AND c.CustomerId = b.CustomerId");
    query.AppendLine("WHERE  c.customerId = " + customerId + "");
    query.AppendLine("AND    b.businessCode = '" + businessCode.ToString() + "'");

    //Do all the grunt work
    ExecuteQuery(query.ToString());
}