diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Base64EncodedHubProtocol.spec.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Base64EncodedHubProtocol.spec.ts
index 7bd728f94c..2771a7c6d2 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Base64EncodedHubProtocol.spec.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Base64EncodedHubProtocol.spec.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { Base64EncodedHubProtocol } from "../Microsoft.AspNetCore.SignalR.Client.TS/Base64EncodedHubProtocol"
 import { IHubProtocol, HubMessage, ProtocolType } from "../Microsoft.AspNetCore.SignalR.Client.TS/IHubProtocol"
 
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Common.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Common.ts
index e40b74eda6..ed43ca5e57 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Common.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Common.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { ITransport, TransportType } from "../Microsoft.AspNetCore.SignalR.Client.TS/Transports"
 
 export function eachTransport(action: (transport: TransportType) => void) {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Connection.spec.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Connection.spec.ts
index c17a15e5aa..00b3e597ee 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Connection.spec.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Connection.spec.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { IHttpClient } from "../Microsoft.AspNetCore.SignalR.Client.TS/HttpClient"
 import { HttpConnection } from "../Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection"
 import { IHttpConnectionOptions } from "../Microsoft.AspNetCore.SignalR.Client.TS/IHttpConnectionOptions"
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Formatters.spec.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Formatters.spec.ts
index 9a5dfeb4cb..e0ab806c86 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Formatters.spec.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/Formatters.spec.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { TextMessageFormat, BinaryMessageFormat } from "../Microsoft.AspNetCore.SignalR.Client.TS/Formatters"
 
 describe("Text Message Formatter", () => {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/HubConnection.spec.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/HubConnection.spec.ts
index 20cf28ffcf..c44a02ff5e 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/HubConnection.spec.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/HubConnection.spec.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { IConnection } from "../Microsoft.AspNetCore.SignalR.Client.TS/IConnection"
 import { HubConnection } from "../Microsoft.AspNetCore.SignalR.Client.TS/HubConnection"
 import { DataReceived, ConnectionClosed } from "../Microsoft.AspNetCore.SignalR.Client.TS/Common"
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/JasmineUtils.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/JasmineUtils.ts
index a546807526..be452ac96f 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/JasmineUtils.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/JasmineUtils.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 export function asyncit(expectation: string, assertion?: () => Promise<any>, timeout?: number): void {
     let testFunction: (done: DoneFn) => void;
     if (assertion) {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/MessagePackHubProtocol.spec.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/MessagePackHubProtocol.spec.ts
index 8d62a2c30a..5b5e373082 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/MessagePackHubProtocol.spec.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS.Tests/MessagePackHubProtocol.spec.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { MessagePackHubProtocol } from "../Microsoft.AspNetCore.SignalR.Client.TS/MessagePackHubProtocol"
 import { MessageType, InvocationMessage, CompletionMessage, ResultMessage } from "../Microsoft.AspNetCore.SignalR.Client.TS/IHubProtocol"
 
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Base64EncodedHubProtocol.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Base64EncodedHubProtocol.ts
index acdb6cf194..1015fd5609 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Base64EncodedHubProtocol.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Base64EncodedHubProtocol.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { IHubProtocol, HubMessage, ProtocolType } from "./IHubProtocol"
 
 export class Base64EncodedHubProtocol implements IHubProtocol {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Common.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Common.ts
index f54f74cfac..a5a7029f55 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Common.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Common.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 export declare type DataReceived = (data: any) => void;
 export declare type ConnectionClosed = (e?: Error) => void;
 export declare type TransportClosed = (e?: Error) => void;
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Formatters.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Formatters.ts
index 9f2de9fa0a..adc794a884 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Formatters.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Formatters.ts
@@ -1,4 +1,6 @@
-
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 export namespace TextMessageFormat {
 
     const RecordSeparator = String.fromCharCode(0x1e);
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpClient.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpClient.ts
index 9223b95b37..df9d69ee95 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpClient.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpClient.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { HttpError } from "./HttpError"
 
 export interface IHttpClient {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection.ts
index 641f3845f2..2549c72495 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpConnection.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { DataReceived, ConnectionClosed } from "./Common"
 import { IConnection } from "./IConnection"
 import { ITransport, TransferMode, TransportType, WebSocketTransport, ServerSentEventsTransport, LongPollingTransport } from "./Transports"
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpError.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpError.ts
index e8c04c3e79..24e6383c0b 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpError.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HttpError.ts
@@ -1,4 +1,7 @@
-export class HttpError extends Error {
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+export class HttpError extends Error {
     statusCode: number;
     constructor(errorMessage: string, statusCode: number) {
         super(errorMessage);
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HubConnection.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HubConnection.ts
index 2d681793bd..4c257c6d20 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HubConnection.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/HubConnection.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { ConnectionClosed } from "./Common"
 import { IConnection } from "./IConnection"
 import { TransportType, TransferMode } from "./Transports"
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IConnection.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IConnection.ts
index dee6616196..ef90d27a98 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IConnection.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IConnection.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { DataReceived, ConnectionClosed } from "./Common"
 import { TransportType, TransferMode, ITransport } from  "./Transports"
 
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IHttpConnectionOptions.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IHttpConnectionOptions.ts
index c722ca3a6d..aebb2a50a0 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IHttpConnectionOptions.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IHttpConnectionOptions.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { IHttpClient } from "./HttpClient"
 import { TransportType, ITransport } from "./Transports"
 import { ILogger, LogLevel } from "./ILogger";
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IHubProtocol.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IHubProtocol.ts
index 6f81641380..d8a1da9668 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IHubProtocol.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/IHubProtocol.ts
@@ -1,4 +1,7 @@
-export const enum MessageType {
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+export const enum MessageType {
     Invocation = 1,
     Result,
     Completion
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/ILogger.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/ILogger.ts
index 43047c1261..b45dadf4ef 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/ILogger.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/ILogger.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 export enum LogLevel {
     Information = 0,
     Warning,
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/JsonHubProtocol.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/JsonHubProtocol.ts
index 67158168ee..4502110373 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/JsonHubProtocol.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/JsonHubProtocol.ts
@@ -1,4 +1,7 @@
-import { TextMessageFormat } from "./Formatters";
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+import { TextMessageFormat } from "./Formatters";
 import { IHubProtocol, ProtocolType, HubMessage } from "./IHubProtocol";
 
 export class JsonHubProtocol implements IHubProtocol {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Loggers.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Loggers.ts
index 3dd49d3ef5..ddc08106ee 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Loggers.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Loggers.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { ILogger, LogLevel } from "./ILogger"
 
 export class NullLogger implements ILogger {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/MessagePackHubProtocol.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/MessagePackHubProtocol.ts
index 5892cc744f..05d9f1ba7e 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/MessagePackHubProtocol.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/MessagePackHubProtocol.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { IHubProtocol, ProtocolType, MessageType, HubMessage, InvocationMessage, ResultMessage, CompletionMessage } from "./IHubProtocol";
 import { BinaryMessageFormat } from "./Formatters"
 import * as msgpack5 from "msgpack5"
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Observable.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Observable.ts
index 8c527f0dbf..105b01b8d4 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Observable.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Observable.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 // TODO: Seamless RxJs integration
 // From RxJs: https://github.com/ReactiveX/rxjs/blob/master/src/Observer.ts
 export interface Observer<T> {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Transports.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Transports.ts
index 3830c24339..ecadd77ffa 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Transports.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/Transports.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 import { DataReceived, TransportClosed } from "./Common"
 import { IHttpClient } from "./HttpClient"
 import { HttpError } from "./HttpError"
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/index.ts b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/index.ts
index de2de2f719..1f9945e6e6 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/index.ts
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Client.TS/index.ts
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 export * from "./Common"
 export * from "./HttpConnection"
 export * from "./HttpClient"
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/common.js b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/common.js
index 3be66a15da..eeae3d9c6b 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/common.js
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/common.js
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 "use strict";
 
 var ECHOENDPOINT_URL = "http://" + document.location.host + "/echo";
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/connectionTests.js b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/connectionTests.js
index 903538c49a..d2c6e59911 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/connectionTests.js
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/connectionTests.js
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 "use strict";
 
 describe('connection', function () {
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/hubConnectionTests.js b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/hubConnectionTests.js
index ba0d41387b..d91a9d505d 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/hubConnectionTests.js
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/hubConnectionTests.js
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 'use strict';
 
 var TESTHUBENDPOINT_URL = 'http://' + document.location.host + '/testhub';
diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/webSocketTests.js b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/webSocketTests.js
index 42ead2c96b..12a26d2e7c 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/webSocketTests.js
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/js/webSocketTests.js
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 'use strict';
 
 describe('WebSockets', function () {