gistfile1.cs

interface IMyInterface
{
    String Name { get; }
}

abstract class MyBaseClass : IMyInterface
{
    // We MUST write this stub or it fails to compile for
    // not implementing IMyInterface - despite being abstract.
    public abstract String Name { get; }
}

class MyDerivedClass : MyBaseClass
{
    // Fails to compile because MyBaseClass doesn't specify a set accessor!
    public override String Name
    {
        get;
        set; // We want to allow users who have a concrete instance of MyDerivedClass (such as a View in MVVM)
             // to be able to set a new value here.
    }
}

// ********************************************************************
// It is possible to work around this by instead doing the following...
// But notice that MyBaseClass can no longer implement IMyInterface
// or more importantly, (safely) refer to "this" as IMyInterface.
// ********************************************************************

interface IMyInterface
{
    String Name { get; }
}

abstract class MyBaseClass
{
    // ...
}

class MyDerivedClass : MyBaseClass, IMyInterface
{
    public String Name { get; set; }
}