Can parameters be constant?

Question

I\'m looking for the C# equivalent of Java\'s final. Does it exist?

Does C# have anything like the following:

public Fo         


        

Answer 1

Create an interface for your class that has only readonly property accessors. Then have your parameter be of that interface rather than the class itself. Example:

public interface IExample
{
    int ReadonlyValue { get; }
}

public class Example : IExample
{
    public int Value { get; set; }
    public int ReadonlyValue { get { return this.Value; } }
}


public void Foo(IExample example)
{
    // Now only has access to the get accessors for the properties
}

For structs, create a generic const wrapper.

public struct Const
{
    public T Value { get; private set; }

    public Const(T value)
    {
        this.Value = value;
    }
}

public Foo(Const X, Const Y, Const Z)
{
// Can only read these values
}

Its worth noting though, that its strange that you want to do what you're asking to do regarding structs, as the writer of the method you should expect to know whats going on in that method. It won't affect the values passed in to modify them within the method, so your only concern is making sure you behave yourself in the method you're writing. There comes a point where vigilance and clean code are the key, over enforcing const and other such rules.