Problem with auto property

SharpDevelop 5.1.0

Target Framework: 4.5.2

I am getting this error:

'Compilation.Dimentions.Width.get' must declare a body because it is not marked abstract or extern. Automatically implemented properties must define both get and set accessors. (CS0840) - C:\Users\Gary\Documents\SharpDevelop Projects\Compilation\Compilation\Dimentions.cs:18,28

publicclassResolution
    {
        publicint Height { get; }
        publicint Width { get; }
                
        publicResolution(int Height, int Width)
        {
            this.Height = Height;
            this.Width = Width;
        }
    }

This code works fine in Visual Studio, what am I missing?