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where T : class, new()

Wide-eyed Wolverine answered on July 23, 2020 Popularity 6/10 Helpfulness 1/10

answer where T : class, new()

where T : class, new()

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public void MakeCars()
{
    //This won't compile as researchEngine doesn't have a public constructor and so can't be instantiated.
    CarFactory<ResearchEngine> researchLine = new CarFactory<ResearchEngine>();
    var researchEngine = researchLine.MakeEngine();

    //Can instantiate new object of class with default public constructor
    CarFactory<ProductionEngine> productionLine = new CarFactory<ProductionEngine>();
    var productionEngine = productionLine.MakeEngine();
}

public class ProductionEngine { }
public class ResearchEngine
{
    private ResearchEngine() { }
}

public class CarFactory<TEngine> where TEngine : class, new()
{
    public TEngine MakeEngine()
    {
        return new TEngine();
    }
}

Popularity 6/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: whatever where

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Contributed on Jul 23 2020

Wide-eyed Wolverine

0 Answers Avg Quality 2/10

where T : class, new()

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where T : class, new()

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