Explicit constructor call in C#

So, today I reflected an arbitary .NET assembly using ILSpy + dotPeek to gain deeper insight about how IL code works when I stumbled upon this weird part (dummy example):

public class SomeBaseClass {
    public SomeBaseClass(SomeType[] iExpectACollection) {
        ...
    }
}

public class SomeDerivedClass {
    public SomeDerivedClass(SomeType onlyOneInstance) {
        SomeType[] collection;
        if(onlyOneInstance != null)
            collection = new SomeType[] { onlyOneInstance };
        base.\u002Ector(collection);
    }
}

As far as I can see, the derived class doesn't call the base constructor in the first place, but instead does something with onlyOneInstance and then calls be base constructor.

My question is: Is it possible to call the base constructor explicitly in C# after some work has been done? Or is this only possible in IL? I know it's being easily done in e.g. Java using super(), however I've never seen it in .NET.