Skeleton Code

Let's quickly look at what can be viewed as skeleton code for most any C# application, code that illustrates a basic outline for a simple, no-frills C# application. You might want type this into a file and save it to use as a template in the future. Notice that the angle brackets denote where you need to supply information.

using 
namespace 
class 
{
    public static void Main()
    {
    }
}

Class Ambiguity In the case of a type being defined in more than one referenced namespace, the compiler will emit an error denoting the ambiguity. Therefore, the following code will not compile because the class C is defined in two namespaces that are both referenced with the using directive: -

using A;
using B;

namespace A
{
    class C
    {
        public static void foo()
        {
            System.Console.WriteLine("A.C.foo");
        }
    }
}

namespace B
{
    class C
    {
        public static void foo()
        {
            System.Console.WriteLine("B.C.foo");
        }
    }
}

class MultiplyDefinedClassesApp
{
    public static void Main()
    {
        C.foo();
    }
}

To avoid this type of error, make sure to give your classes and methods unique, descriptive names.