diff --git a/FunctionalTests/Microsoft.Bot.Builder.FunctionalTests/DirectLineClientTests.cs b/FunctionalTests/Microsoft.Bot.Builder.FunctionalTests/DirectLineClientTests.cs
index 61206b4a8..1afcbf023 100644
--- a/FunctionalTests/Microsoft.Bot.Builder.FunctionalTests/DirectLineClientTests.cs
+++ b/FunctionalTests/Microsoft.Bot.Builder.FunctionalTests/DirectLineClientTests.cs
@@ -79,7 +79,7 @@ namespace Microsoft.Bot.Builder.FunctionalTests
                 var activitySet = await client.Conversations.GetActivitiesAsync(conversationId, watermark);
                 watermark = activitySet?.Watermark;
 
-                // Extract the activies sent from the bot.
+                // Extract the activities sent from the bot.
                 var activities = from x in activitySet.Activities
                                  where x.From.Id == botId
                                  select x;
diff --git a/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisApplication.cs b/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisApplication.cs
index 64c791b60..9d2336f0e 100644
--- a/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisApplication.cs
+++ b/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisApplication.cs
@@ -31,7 +31,7 @@ namespace Microsoft.Bot.Builder.AI.Luis
         /// <summary>
         /// Initializes a new instance of the <see cref="LuisApplication"/> class.
         /// </summary>
-        /// <param name="service">LUIS coonfiguration.</param>
+        /// <param name="service">LUIS configuration.</param>
         public LuisApplication(LuisService service)
             : this((service.AppId, service.SubscriptionKey, service.GetEndpoint()))
         {
diff --git a/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisUtil.cs b/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisUtil.cs
index 242a297fe..c019b07a5 100644
--- a/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisUtil.cs
+++ b/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisUtil.cs
@@ -292,7 +292,7 @@ namespace Microsoft.Bot.Builder.AI.Luis
         /// <summary>
         /// If a property doesn't exist add it to a new array, otherwise append it to the existing array.
         /// </summary>
-        /// <param name="obj">Object in wich the property will be added.</param>
+        /// <param name="obj">Object in which the property will be added.</param>
         /// <param name="key">Key of the property.</param>
         /// <param name="value">Value for the property.</param>
         internal static void AddProperty(JObject obj, string key, JToken value)
diff --git a/libraries/Microsoft.Bot.Builder.AI.QnA/QnAMaker.cs b/libraries/Microsoft.Bot.Builder.AI.QnA/QnAMaker.cs
index 1e6126b54..2772664dd 100644
--- a/libraries/Microsoft.Bot.Builder.AI.QnA/QnAMaker.cs
+++ b/libraries/Microsoft.Bot.Builder.AI.QnA/QnAMaker.cs
@@ -36,7 +36,7 @@ namespace Microsoft.Bot.Builder.AI.QnA
         /// <param name="httpClient">An alternate client with which to talk to QnAMaker.
         /// If null, a default client is used for this instance.</param>
         /// <param name="telemetryClient">The IBotTelemetryClient used for logging telemetry events.</param>
-        /// <param name="logPersonalInformation">Set to true to include personally indentifiable information in telemetry events.</param>
+        /// <param name="logPersonalInformation">Set to true to include personally identifiable information in telemetry events.</param>
         public QnAMaker(QnAMakerEndpoint endpoint, QnAMakerOptions options, HttpClient httpClient, IBotTelemetryClient telemetryClient, bool logPersonalInformation = false)
         {
             _endpoint = endpoint ?? throw new ArgumentNullException(nameof(endpoint));
@@ -97,7 +97,7 @@ namespace Microsoft.Bot.Builder.AI.QnA
         /// <param name="httpClient">An alternate client with which to talk to QnAMaker.
         /// If null, a default client is used for this instance.</param>
         /// <param name="telemetryClient">The IBotTelemetryClient used for logging telemetry events.</param>
-        /// <param name="logPersonalInformation">Set to true to include personally indentifiable information in telemetry events.</param>
+        /// <param name="logPersonalInformation">Set to true to include personally identifiable information in telemetry events.</param>
         public QnAMaker(QnAMakerService service, QnAMakerOptions options, HttpClient httpClient, IBotTelemetryClient telemetryClient, bool logPersonalInformation = false)
             : this(new QnAMakerEndpoint(service), options, httpClient, telemetryClient, logPersonalInformation)
         {
diff --git a/libraries/Microsoft.Bot.Builder.Dialogs/DialogContext.cs b/libraries/Microsoft.Bot.Builder.Dialogs/DialogContext.cs
index 26ee1bc1f..daac770f9 100644
--- a/libraries/Microsoft.Bot.Builder.Dialogs/DialogContext.cs
+++ b/libraries/Microsoft.Bot.Builder.Dialogs/DialogContext.cs
@@ -50,10 +50,10 @@ namespace Microsoft.Bot.Builder.Dialogs
         public List<DialogInstance> Stack { get; private set; }
 
         /// <summary>
-        /// Gets or sets the The parent DialogContext if any. Used when searching for dialogs to start.
+        /// Gets or sets the parent DialogContext if any. Used when searching for dialogs to start.
         /// </summary>
         /// <value>
-        /// The The parent DialogContext if any. Used when searching for dialogs to start.
+        /// The parent DialogContext if any. Used when searching for dialogs to start.
         /// </value>
         public DialogContext Parent { get; set; }
 
diff --git a/libraries/Microsoft.Bot.Builder/Adapters/TestAdapter.cs b/libraries/Microsoft.Bot.Builder/Adapters/TestAdapter.cs
index 3f0b26c35..ff70dc60d 100644
--- a/libraries/Microsoft.Bot.Builder/Adapters/TestAdapter.cs
+++ b/libraries/Microsoft.Bot.Builder/Adapters/TestAdapter.cs
@@ -187,7 +187,7 @@ namespace Microsoft.Bot.Builder.Adapters
                 {
                     // The BotFrameworkAdapter and Console adapter implement this
                     // hack directly in the POST method. Replicating that here
-                    // to keep the behavior as close as possible to facillitate
+                    // to keep the behavior as close as possible to facilitate
                     // more realistic tests.
                     var delayMs = (int)activity.Value;
 
@@ -298,7 +298,7 @@ namespace Microsoft.Bot.Builder.Adapters
         /// <param name="cancellationToken">A cancellation token that can be used by other objects
         /// or threads to receive notice of cancellation.</param>
         /// <returns>A task that represents the work queued to execute.</returns>
-        /// <remarks>This resets the <see cref="ActiveQueue"/>, and does not maintain multiple converstion queues.</remarks>
+        /// <remarks>This resets the <see cref="ActiveQueue"/>, and does not maintain multiple conversation queues.</remarks>
         public Task CreateConversationAsync(string channelId, BotCallbackHandler callback, CancellationToken cancellationToken)
         {
             ActiveQueue.Clear();
@@ -502,7 +502,7 @@ namespace Microsoft.Bot.Builder.Adapters
         /// </summary>
         /// <param name="context">The turnContext (with a valid Activity).</param>
         /// <param name="userId">The user id.</param>
-        /// <param name="includeFilter">Optional comma seperated list of connection's to include. Blank will return token status for all configured connections.</param>
+        /// <param name="includeFilter">Optional comma separated list of connection's to include. Blank will return token status for all configured connections.</param>
         /// <param name="cancellationToken">The cancellation token.</param>
         /// <returns>Array of TokenStatus.</returns>
         public virtual Task<TokenStatus[]> GetTokenStatusAsync(ITurnContext context, string userId, string includeFilter = null, CancellationToken cancellationToken = default(CancellationToken))
@@ -531,7 +531,7 @@ namespace Microsoft.Bot.Builder.Adapters
         /// <param name="resourceUrls">The list of AAD resource URLs.</param>
         /// <param name="userId">The user ID.</param>
         /// <param name="cancellationToken">The cancellationToken.</param>
-        /// <returns>The dicitonary of TokenResponses for each resource URL.</returns>
+        /// <returns>The dictionary of TokenResponses for each resource URL.</returns>
         public virtual Task<Dictionary<string, TokenResponse>> GetAadTokensAsync(ITurnContext context, string connectionName, string[] resourceUrls, string userId = null, CancellationToken cancellationToken = default(CancellationToken))
         {
             return Task.FromResult(new Dictionary<string, TokenResponse>());
diff --git a/libraries/Microsoft.Bot.Builder/Adapters/TestFlow.cs b/libraries/Microsoft.Bot.Builder/Adapters/TestFlow.cs
index 39768138c..fc6690408 100644
--- a/libraries/Microsoft.Bot.Builder/Adapters/TestFlow.cs
+++ b/libraries/Microsoft.Bot.Builder/Adapters/TestFlow.cs
@@ -70,7 +70,7 @@ namespace Microsoft.Bot.Builder.Adapters
         /// </summary>
         /// <returns>Runs the exchange between the user and the bot.</returns>
         /// <remarks>This methods sends the activities from the user to the bot and
-        /// checks the responses from the bot based on the activiies described in the
+        /// checks the responses from the bot based on the activities described in the
         /// current test flow.</remarks>
         public Task StartTestAsync() => _testTask;
 
@@ -309,7 +309,7 @@ namespace Microsoft.Bot.Builder.Adapters
         }
 
         /// <summary>
-        /// Shorcut for adding an arbitray exchange between the user and bot.
+        /// Shortcut for adding an arbitrary exchange between the user and bot.
         /// Each activity with a <see cref="IActivity.From"/>.<see cref="ChannelAccount.Role"/> equals to "bot"
         /// will be processed with the <see cref="AssertReply(IActivity, string, uint)"/> method.
         /// Every other activity will be processed as user's message via the <see cref="Send(IActivity)"/> method.
@@ -337,7 +337,7 @@ namespace Microsoft.Bot.Builder.Adapters
         }
 
         /// <summary>
-        /// Shorcut for adding an arbitray exchange between the user and bot.
+        /// Shortcut for adding an arbitrary exchange between the user and bot.
         /// Each activity with a <see cref="IActivity.From"/>.<see cref="ChannelAccount.Role"/> equals to "bot"
         /// will be processed with the <see cref="AssertReply(IActivity, string, uint)"/> method.
         /// Every other activity will be processed as user's message via the <see cref="Send(IActivity)"/> method.
diff --git a/libraries/Microsoft.Bot.Builder/BotAdapter.cs b/libraries/Microsoft.Bot.Builder/BotAdapter.cs
index d99058adb..f3f7278d5 100644
--- a/libraries/Microsoft.Bot.Builder/BotAdapter.cs
+++ b/libraries/Microsoft.Bot.Builder/BotAdapter.cs
@@ -112,7 +112,7 @@ namespace Microsoft.Bot.Builder
         /// Sends a proactive message to a conversation.
         /// </summary>
         /// <param name="botId">The application ID of the bot. This paramter is ignored in
-        /// single tenant the Adpters (Console, Test, etc) but is critical to the BotFrameworkAdapter
+        /// single tenant the Adapters (Console, Test, etc) but is critical to the BotFrameworkAdapter
         /// which is multi-tenant aware. </param>
         /// <param name="reference">A reference to the conversation to continue.</param>
         /// <param name="callback">The method to call for the resulting bot turn.</param>
diff --git a/libraries/Microsoft.Bot.Builder/BotFrameworkAdapter.cs b/libraries/Microsoft.Bot.Builder/BotFrameworkAdapter.cs
index 2e1806859..aed51b914 100644
--- a/libraries/Microsoft.Bot.Builder/BotFrameworkAdapter.cs
+++ b/libraries/Microsoft.Bot.Builder/BotFrameworkAdapter.cs
@@ -127,7 +127,7 @@ namespace Microsoft.Bot.Builder
 
             // Relocate the tenantId field used by MS Teams to a new location (from channelData to conversation)
             // This will only occur on activities from teams that include tenant info in channelData but NOT in conversation,
-            // thus should be future friendly.  However, once the the transition is complete. we can remove this.
+            // thus should be future friendly.  However, once the transition is complete. we can remove this.
             Use(new TenantIdWorkaroundForTeamsMiddleware());
 
             // DefaultRequestHeaders are not thread safe so set them up here because this adapter should be a singleton.
diff --git a/libraries/Microsoft.Bot.Builder/IBotTelemetryClient.cs b/libraries/Microsoft.Bot.Builder/IBotTelemetryClient.cs
index da02b2225..b1987f628 100644
--- a/libraries/Microsoft.Bot.Builder/IBotTelemetryClient.cs
+++ b/libraries/Microsoft.Bot.Builder/IBotTelemetryClient.cs
@@ -60,7 +60,7 @@ namespace Microsoft.Bot.Builder
         /// Send a trace message.
         /// </summary>
         /// <param name="message">Message to display.</param>
-        /// <param name="severityLevel">Trace severaity level <see cref="Severity"/>.</param>
+        /// <param name="severityLevel">Trace severity level <see cref="Severity"/>.</param>
         /// <param name="properties">Named string values you can use to search and classify events.</param>
         void TrackTrace(string message, Severity severityLevel, IDictionary<string, string> properties);
 
diff --git a/libraries/Microsoft.Bot.Builder/IUserTokenProvider.cs b/libraries/Microsoft.Bot.Builder/IUserTokenProvider.cs
index 94c9fe635..d2a4e5c91 100644
--- a/libraries/Microsoft.Bot.Builder/IUserTokenProvider.cs
+++ b/libraries/Microsoft.Bot.Builder/IUserTokenProvider.cs
@@ -59,7 +59,7 @@ namespace Microsoft.Bot.Builder
         /// </summary>
         /// <param name="context">Context for the current turn of conversation with the user.</param>
         /// <param name="userId">The user Id for which token status is retrieved.</param>
-        /// <param name="includeFilter">Optional comma seperated list of connection's to include. Blank will return token status for all configured connections.</param>
+        /// <param name="includeFilter">Optional comma separated list of connection's to include. Blank will return token status for all configured connections.</param>
         /// <param name="cancellationToken">A cancellation token that can be used by other objects
         /// or threads to receive notice of cancellation.</param>
         /// <returns>Array of TokenStatus.</returns>
@@ -69,7 +69,7 @@ namespace Microsoft.Bot.Builder
         /// Retrieves Azure Active Directory tokens for particular resources on a configured connection.
         /// </summary>
         /// <param name="context">Context for the current turn of conversation with the user.</param>
-        /// <param name="connectionName">The name of the Azure Active Direcotry connection configured with this bot.</param>
+        /// <param name="connectionName">The name of the Azure Active Directory connection configured with this bot.</param>
         /// <param name="resourceUrls">The list of resource URLs to retrieve tokens for.</param>
         /// <param name="userId">The user Id for which tokens are retrieved. If passing in null the userId is taken from the Activity in the ITurnContext.</param>
         /// <param name="cancellationToken">A cancellation token that can be used by other objects
diff --git a/libraries/Microsoft.Bot.Builder/Integration/IAdapterIntegration.cs b/libraries/Microsoft.Bot.Builder/Integration/IAdapterIntegration.cs
index e0a343027..28e5bddf3 100644
--- a/libraries/Microsoft.Bot.Builder/Integration/IAdapterIntegration.cs
+++ b/libraries/Microsoft.Bot.Builder/Integration/IAdapterIntegration.cs
@@ -33,7 +33,7 @@ namespace Microsoft.Bot.Builder.Integration
         /// Sends a proactive message to a conversation.
         /// </summary>
         /// <param name="botId">The application ID of the bot. This paramter is ignored in
-        /// single tenant the Adpters (Console, Test, etc) but is critical to the BotFrameworkAdapter
+        /// single tenant the Adapters (Console, Test, etc) but is critical to the BotFrameworkAdapter
         /// which is multi-tenant aware. </param>
         /// <param name="reference">A reference to the conversation to continue.</param>
         /// <param name="callback">The method to call for the resulting bot turn.</param>
diff --git a/libraries/Microsoft.Bot.Builder/TelemetryLoggerConstants.cs b/libraries/Microsoft.Bot.Builder/TelemetryLoggerConstants.cs
index 1065e27ef..e5ee17af7 100644
--- a/libraries/Microsoft.Bot.Builder/TelemetryLoggerConstants.cs
+++ b/libraries/Microsoft.Bot.Builder/TelemetryLoggerConstants.cs
@@ -8,7 +8,7 @@ namespace Microsoft.Bot.Builder
     /// </summary>
     public static class TelemetryLoggerConstants
     {
-        // The name of the event when when new message is received from the user.
+        // The name of the event when a new message is received from the user.
         public static readonly string BotMsgReceiveEvent = "BotMessageReceived";
 
         // The name of the event when logged when a message is sent from the bot to the user.
diff --git a/libraries/Microsoft.Bot.Builder/TelemetryLoggerMiddleware.cs b/libraries/Microsoft.Bot.Builder/TelemetryLoggerMiddleware.cs
index 8ab79f314..d695e8c6a 100644
--- a/libraries/Microsoft.Bot.Builder/TelemetryLoggerMiddleware.cs
+++ b/libraries/Microsoft.Bot.Builder/TelemetryLoggerMiddleware.cs
@@ -20,7 +20,7 @@ namespace Microsoft.Bot.Builder
         /// Initializes a new instance of the <see cref="TelemetryLoggerMiddleware"/> class.
         /// </summary>
         /// <param name="telemetryClient">The IBotTelemetryClient implementation used for registering telemetry events.</param>
-        /// <param name="logPersonalInformation"> (Optional) TRUE to include personally indentifiable information.</param>
+        /// <param name="logPersonalInformation"> (Optional) TRUE to include personally identifiable information.</param>
         public TelemetryLoggerMiddleware(IBotTelemetryClient telemetryClient, bool logPersonalInformation = false)
         {
             TelemetryClient = telemetryClient ?? new NullBotTelemetryClient();
diff --git a/libraries/Microsoft.Bot.Configuration/BotConfigurationExtensions.cs b/libraries/Microsoft.Bot.Configuration/BotConfigurationExtensions.cs
index dc7a0c4cb..2a6f29e0c 100644
--- a/libraries/Microsoft.Bot.Configuration/BotConfigurationExtensions.cs
+++ b/libraries/Microsoft.Bot.Configuration/BotConfigurationExtensions.cs
@@ -66,7 +66,7 @@ namespace Microsoft.Bot.Configuration
             // Get all the Dispatch (Luis) types in the service list
             var dispatchServices = botConfiguration.Services.OfType<DispatchService>();
 
-            // The dispatch service is not always included in the the bot configuration files.
+            // The dispatch service is not always included in the bot configuration files.
             // Therefore, it will only be validated if the bot configuration file contains at least one service of this type.
             if (dispatchServices.Any())
             {
diff --git a/libraries/Microsoft.Bot.Connector/Authentication/EndorsementsValidator.cs b/libraries/Microsoft.Bot.Connector/Authentication/EndorsementsValidator.cs
index aaf695698..ad5f2a128 100644
--- a/libraries/Microsoft.Bot.Connector/Authentication/EndorsementsValidator.cs
+++ b/libraries/Microsoft.Bot.Connector/Authentication/EndorsementsValidator.cs
@@ -25,7 +25,7 @@ namespace Microsoft.Bot.Connector.Authentication
         /// <param name="expectedEndorsement">The expected endorsement. Generally the ID of the channel to validate, typically extracted from the activity's
         /// <see cref="Schema.Activity.ChannelId"/> property, that to which the Activity is affinitized. Alternatively, it could represent a compliance certification that is required.</param>
         /// <param name="endorsements">The JWT token’s signing party is permitted to send activities only for
-        /// specific channels. That list, the set of channels the service can sign for, is called the the endorsement list.
+        /// specific channels. That list, the set of channels the service can sign for, is called the endorsement list.
         /// The activity’s <see cref="Schema.Activity.ChannelId"/> MUST be found in the endorsement list, or the incoming
         /// activity is not considered valid.</param>
         /// <returns>True if the channel ID is found in the endorsements list; otherwise, false.</returns>
diff --git a/libraries/Microsoft.Bot.Connector/OAuthClientOld.cs b/libraries/Microsoft.Bot.Connector/OAuthClientOld.cs
index 081de4df9..ab298906e 100644
--- a/libraries/Microsoft.Bot.Connector/OAuthClientOld.cs
+++ b/libraries/Microsoft.Bot.Connector/OAuthClientOld.cs
@@ -316,7 +316,7 @@ namespace Microsoft.Bot.Connector
         /// Get the status of tokens for connections for this bot for a particular user.
         /// </summary>
         /// <param name="userId">User id.</param>
-        /// <param name="includeFilter">A comma seperated list of connections to include. If null, then all connections are returned.</param>
+        /// <param name="includeFilter">A comma separated list of connections to include. If null, then all connections are returned.</param>
         /// <param name="cancellationToken">Cancellation Token.</param>
         /// <returns>TokenStatus.</returns>
         public async Task<TokenStatus[]> GetTokenStatusAsync(string userId, string includeFilter = null, CancellationToken cancellationToken = default(CancellationToken))
diff --git a/libraries/integration/Microsoft.Bot.Builder.Integration.ApplicationInsights.Core/ServiceCollectionExtensions.cs b/libraries/integration/Microsoft.Bot.Builder.Integration.ApplicationInsights.Core/ServiceCollectionExtensions.cs
index 13442609e..258c994c1 100644
--- a/libraries/integration/Microsoft.Bot.Builder.Integration.ApplicationInsights.Core/ServiceCollectionExtensions.cs
+++ b/libraries/integration/Microsoft.Bot.Builder.Integration.ApplicationInsights.Core/ServiceCollectionExtensions.cs
@@ -103,7 +103,7 @@ namespace Microsoft.Bot.Builder.Integration.ApplicationInsights.Core
         /// </summary>
         /// <param name="services">The <see cref="IServiceCollection"/> which specifies the contract for a collection of service descriptors.</param>
         /// <param name="botTelemetryClient">Bot Telemetry Client that logs event information.</param>
-        /// <param name="instrumentationKey">If Bot Telemetry Client is using Application Insights, provide the instumentation key.</param>
+        /// <param name="instrumentationKey">If Bot Telemetry Client is using Application Insights, provide the instrumentation key.</param>
         /// <returns>A reference to this instance after the operation has completed.</returns>
         public static IServiceCollection AddBotApplicationInsights(this IServiceCollection services, IBotTelemetryClient botTelemetryClient, string instrumentationKey = null)
         {