app.d.ts

declare namespace CS {
    // const __keep_incompatibility: unique symbol;
    // 
    // interface $Ref<T> {
    //     value: T
    // }
    // namespace System {
    //     interface Array$1<T> extends System.Array {
    //         get_Item(index: number):T;
    //         
    //         set_Item(index: number, value: T):void;
    //     }
    // }
    // interface $Task<T> {}
    namespace System {
        class Object
        {
            protected [__keep_incompatibility]: never;
        }
        class Array extends System.Object implements System.Collections.IEnumerable, System.ICloneable, System.Collections.IList, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable, System.Collections.ICollection
        {
            protected [__keep_incompatibility]: never;
        }
        interface ICloneable
        {
        }
    }
    namespace System.Collections {
        interface IEnumerable
        {
        }
        interface IList extends System.Collections.IEnumerable, System.Collections.ICollection
        {
        }
        interface ICollection extends System.Collections.IEnumerable
        {
        }
        interface IStructuralComparable
        {
        }
        interface IStructuralEquatable
        {
        }
    }
}