SetProperty.cs

    public static T SetProperty<T, U>(
        this T @this,
        Expression<Func<T, U>> propertyExpression,
        U value)
    {
        propertyExpression
            .Body
            .ConvertTo<MemberExpression>()
            .Member
            .Name
            .Map(@this.GetType().GetProperty)
            .SetValue(@this, value);

        return @this;
    }