#632 – Partial Methods

A partial method is a method in a partial class that is declared in one part of the class and implemented in another part.

In the example below, we declare a Growl method in part 1 of a class without implementing it.

    // In Dog-1.cs
    public partial class Dog
    {
        public string Name { get; set; }

        public void Bark()
        {
            Console.WriteLine("Woof");
            this.Growl();
        }

        // Partial method declaration
        partial void Growl();
    }

We can then include the implementation of the Growl method in part 2 of the class.

    // Dog-2.cs
    public partial class Dog
    {
        public void Fetch()
        {
            Console.WriteLine("Fetching..");
        }

        // Partial method implementation
        partial void Growl()
        {
            Console.WriteLine("Growling..");
        }
    }

The code in Dog-1.cs is saying that there is a Growl method in the Dog class, but that it will be implemented elsewhere.

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About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

5 Responses to #632 – Partial Methods

  1. Pingback: #633 – The Implementation of A Partial Method Is Optional « 2,000 Things You Should Know About C#

  2. Pingback: #634 – Invoking Partial Methods That Have No Implementation « 2,000 Things You Should Know About C#

  3. Pingback: #635 – Limitations on Partial Methods « 2,000 Things You Should Know About C#

  4. Pingback: #636 – The Reason for Partial Methods « 2,000 Things You Should Know About C#

  5. Pingback: #638 – Defining and Using a Partial struct « 2,000 Things You Should Know About C#

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