C# Language Tutorial => Partial classes

Example

Partial classes provide an ability to split class declaration (usually into separate files). A common problem that can be solved with partial classes is allowing users to modify auto-generated code without fearing that their changes will be overwritten if the code is regenerated. Also multiple developers can work on same class or methods.

using System;

namespace PartialClassAndMethods
{
    public partial class PartialClass
    {
        public void ExampleMethod() {
            Console.WriteLine("Method call from the first declaration.");
        }
    }

    public partial class PartialClass
    {
        public void AnotherExampleMethod()
        {
            Console.WriteLine("Method call from the second declaration.");
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            PartialClass partial = new PartialClass();
            partial.ExampleMethod(); // outputs "Method call from the first declaration."
            partial.AnotherExampleMethod(); // outputs "Method call from the second declaration."
        }
    }
}

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C# Language Partial class and methods Partial classes

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