Examples for rscg_Interface_to_null_object: Simplifying the Null Object Pattern

Now I can show some examples for rscg_Interface_to_null_object. This project aims to simplify the implementation of the Null Object Pattern in C# by automatically generating null object classes from interfaces.

I will start with those 2 interfaces:

using InterfaceToNullObject;

namespace IntegrationConsole;
[ToNullObject]
public interface IDepartment
{
    public string Name { get; set; }
}

and

using InterfaceToNullObject;

namespace IntegrationConsole;
[ToNullObject]
public interface IEmployee
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public IDepartment Department { get; set; }
    public string GetFullName();

    public string GetFullNameAndDepartment(string separator);
    public bool MoveEmployeeToDepartment(IDepartment department);

}

The generated code is the following

// <auto-generated>
    //     This code was generated by a tool :rscg_Interface_to_null_object
    //     Runtime Version: José Saramago is feeling diplomatic in Bissau
    //     DateOfTool : 2025-01-20 16:28:25
    //     Changes to this file may cause incorrect behavior and will be lost if
    //     the code is regenerated.
    // </auto-generated>
//------------------------------------------------------------------------------
/// <summary>
    /// This static partial class contains extension methods for sorting collections of IDepartment objects.
    /// </summary>

 #nullable enable
 #pragma warning disable CS8603
 #pragma warning disable CS8625
[global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
[global::System.CodeDom.Compiler.GeneratedCode("GeneratorName","2025.10120.11628.125")]
public partial class Department_null : global::IntegrationConsole.IDepartment
{

        public virtual string Name { get; set; } = default(string);
    
}

#nullable restore
#pragma warning restore CS8603
#pragma warning restore CS8625

And the employee

// <auto-generated>
    //     This code was generated by a tool :rscg_Interface_to_null_object
    //     Runtime Version: José Saramago is feeling diplomatic in Bissau
    //     DateOfTool : 2025-01-20 16:28:25
    //     Changes to this file may cause incorrect behavior and will be lost if
    //     the code is regenerated.
    // </auto-generated>
//------------------------------------------------------------------------------
/// <summary>
    /// This static partial class contains extension methods for sorting collections of IEmployee objects.
    /// </summary>

 #nullable enable
 #pragma warning disable CS8603
 #pragma warning disable CS8625
[global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
[global::System.CodeDom.Compiler.GeneratedCode("GeneratorName","2025.10120.11628.125")]
public partial class Employee_null : global::IntegrationConsole.IEmployee
{

        public virtual string FirstName { get; set; } = default(string);
    
        public virtual string LastName { get; set; } = default(string);
    
        public virtual IntegrationConsole.IDepartment Department { get; set; } = default(IntegrationConsole.IDepartment);
    
        public virtual string GetFullName() { return default(string); }
    
        public virtual string GetFullNameAndDepartment(string separator) { return default(string); }
    
        public virtual bool MoveEmployeeToDepartment(global::IntegrationConsole.IDepartment department) { return default(bool); }
    
}

#nullable restore
#pragma warning restore CS8603
#pragma warning restore CS8625

So please checkout rscg_Interface_to_null_object.