Hide base class property in derived class

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C#

inheritance

This is my Base class

public class BaseClass
{
    public string property1
    {
        get;
        set;
    }
    public string property2
    {
        get;
        set;
    }
    public string property3
    {
        get;
        set;
    }
}

and this is my derived class

public class DerivedClass : BaseClass
{

    private override string property3
    {
        get;
        set;
    }
}

I want to hide proerty3 in derived class. but i am getting this error "virtual or abstract members cannot be private".

How i can hide the base class property?

Thanks in advance.