поле ввода, только числа jquery/js

В Библиотеке кода джедая (JCL) - свободный - существует JclDotNet.pas, содержа класс TJclClrHost, вероятно, делая то, что Вы хотите:

  TJclClrHost = class(TJclClrBase, ICorRuntimeHost)
  private
    FDefaultInterface: ICorRuntimeHost;
    FAppDomains: TObjectList;
    procedure EnumAppDomains;
    function GetAppDomain(const Idx: Integer): TJclClrAppDomain;
    function GetAppDomainCount: Integer;
    function GetDefaultAppDomain: IJclClrAppDomain;
    function GetCurrentAppDomain: IJclClrAppDomain;
  protected
    function AddAppDomain(const AppDomain: TJclClrAppDomain): Integer;
    function RemoveAppDomain(const AppDomain: TJclClrAppDomain): Integer; 
  public
    constructor Create(const ClrVer: WideString = '';
      const Flavor: TJclClrHostFlavor = hfWorkStation;
      const ConcurrentGC: Boolean = True;
      const LoaderFlags: TJclClrHostLoaderFlags = [hlOptSingleDomain]);
    destructor Destroy; override;
    procedure Start;
    procedure Stop;
    procedure Refresh;
    function CreateDomainSetup: TJclClrAppDomainSetup;
    function CreateAppDomain(const Name: WideString;
      const Setup: TJclClrAppDomainSetup = nil;
      const Evidence: IJclClrEvidence = nil): TJclClrAppDomain;
    function FindAppDomain(const Intf: IJclClrAppDomain; var Ret: TJclClrAppDomain): Boolean; overload;
    function FindAppDomain(const Name: WideString; var Ret: TJclClrAppDomain): Boolean; overload;
    class function CorSystemDirectory: WideString;
    class function CorVersion: WideString;
    class function CorRequiredVersion: WideString;
    class procedure GetClrVersions(VersionNames: TWideStrings); overload;
    class procedure GetClrVersions(VersionNames: TStrings); overload;
    property DefaultInterface: ICorRuntimeHost read FDefaultInterface implements ICorRuntimeHost;
    property AppDomains[const Idx: Integer]: TJclClrAppDomain read GetAppDomain; default;
    property AppDomainCount: Integer read GetAppDomainCount;
    property DefaultAppDomain: IJclClrAppDomain read GetDefaultAppDomain;
    property CurrentAppDomain: IJclClrAppDomain read GetCurrentAppDomain;
  end;