Passing an interface in Parameters C#

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What is the Benefit of passing in Parameters? What can we achieve from this? What is the purpose of?

interface IBankAccount
{
    void PayIn(decimal amount);
    bool Withdraw(decimal amount);
    decimal Balance { get; }
}

interface ITransferBankAccount : IBankAccount
{
    bool TranferTo(IBankAccount destination, decimal amount);
}

class CurrentAccount : ITransferBankAccount
{

    public bool TranferTo(IBankAccount destination, decimal amount)
    {
        bool result;
        result = Withdraw(amount);
        if (result)
        {
            destination.PayIn(amount);
        }
        return result;
    }



    public decimal Balance
    {
        get
        {
            throw new NotImplementedException();
        }
    }

    public void PayIn(decimal amount)
    {
        throw new NotImplementedException();
    }





  public bool Withdraw(decimal amount)
    {
        throw new NotImplementedException();
    }

Demo Code showing This technique Thanks in Advance

[Solved] Passing an Interface as a parameter, All wrong. You need to understand a number of very fundamental and pretty simple things. Interface are real types. You need to understand that� If you don't use implicit typing, and just define your variable as the interface, it will work: IMyInterface model = new MyClass(): MyMethod(ref model); Arguments passed by ref must match the type exactly, as they can be reassigned within the method to another type that matches that contract.

Passing Interface As Parameter in C# - 153, This is a video tutorial about passing interface as parameter in csharp/c# dotnet.Duration: 1:58 Posted: Jun 15, 2016 My class inherits the interface, allowing me to pass it as a parameter under that interface type. (Like an alias.) Simply using component.GetType().ToString() shows me the real type, however, the generic parameter won't accept it, so perhaps a dynamic(the keyword) object, or something, "var", etc, could help accomplish this.

Basically, you can pass in any class that conforms to that interface.

Generic Interfaces, When an interface is specified as a constraint on a type parameter, only types that implement the interface can be used. The following code� The formal parameter type is an interface type - that means that you can pass in any object that implements this interface (or rather, an instance of an object that implements the interface). You are not passing in an interface, you are passing in an object that conforms to the contract defined by the interface. So, if your data source is SQL

C#, In C#, you are allowed to create a reference variable of an interface It does not allow accessing any other variables or methods that might be� Generic interfaces can inherit from non-generic interfaces if the generic interface is contravariant, which means it only uses its type parameter as a return value. In the .NET Framework class library, IEnumerable<T> inherits from IEnumerable because IEnumerable<T> only uses T in the return value of GetEnumerator and in the Current property getter.

The optional parameter contains a default value in function definition. If we do not pass optional argument value at calling time, the default value is used. Thera are different ways to make a parameter optional. In the above example, the method OptionalMethodWithDefaultValue(int value1, int value2

Passing by reference enables function members, methods, properties, indexers, operators, and constructors to change the value of the parameters and have that change persist in the calling environment. To pass a parameter by reference with the intent of changing the value, use the ref, or out keyword.

Comments
  • Please add code and not picture
  • While this is correct, I don't think it explains very much what are the benefits of programming to interfaces and not to implementation.
  • @ZoharPeled Do you think that an example would make it more clear? If so, please let me know, in order to delete my answer, update it and un-delete it. Thanks
  • I don't think you should delete it, just explain a little deeper. simple code example always helps, I think. You might also want to write a sentence or two about polimorphism and how it relates to this issue.
  • @Christos Could you make it more clear??? i actually didn't get it fully.. any code? That help to understand it
  • @Christos I've started to write a comment to your answer with what I would write, but it was too long so I've added it as an answer...
  • for the extra info (+1) from me :)