diff --git a/src/sql/base/browser/ui/loadingSpinner/loadingSpinner.component.ts b/src/sql/base/browser/ui/loadingSpinner/loadingSpinner.component.ts
index ded55f5405..2a1fb3722e 100644
--- a/src/sql/base/browser/ui/loadingSpinner/loadingSpinner.component.ts
+++ b/src/sql/base/browser/ui/loadingSpinner/loadingSpinner.component.ts
@@ -37,11 +37,11 @@ export default class LoadingSpinner implements OnChanges {
 	}
 
 	@Input()
-	loading: boolean;
+	loading?: boolean;
 
 	@Input()
-	loadingMessage: string;
+	loadingMessage?: string;
 
 	@Input()
-	loadingCompletedMessage: string;
+	loadingCompletedMessage?: string;
 }
diff --git a/src/sql/base/browser/ui/panel/panel.component.ts b/src/sql/base/browser/ui/panel/panel.component.ts
index 6c679c7279..add79079da 100644
--- a/src/sql/base/browser/ui/panel/panel.component.ts
+++ b/src/sql/base/browser/ui/panel/panel.component.ts
@@ -107,7 +107,7 @@ export class PanelComponent extends Disposable implements IThemable {
 	private _actionbar?: ActionBar;
 	private _mru: TabComponent[] = [];
 	private _tabExpanded: boolean = true;
-	private _styleElement: HTMLStyleElement;
+	private _styleElement!: HTMLStyleElement;
 
 	protected AutoScrollbarVisibility = ScrollbarVisibility.Auto; // used by angular template
 	protected HiddenScrollbarVisibility = ScrollbarVisibility.Hidden; // used by angular template
@@ -266,7 +266,7 @@ export class PanelComponent extends Disposable implements IThemable {
 	public updateTab(tabId: string, config: { title?: string, iconClass?: string }): void {
 		// First find the tab and update it with the new values. Then manually refresh the
 		// tab header since it won't detect changes made to the corresponding tab by itself.
-		let tabHeader: TabHeaderComponent;
+		let tabHeader: TabHeaderComponent | undefined;
 		const tabHeaders = this._tabHeaders.toArray();
 		const tab = this._tabs.find((item, i) => {
 			if (item.identifier === tabId) {
diff --git a/src/sql/base/browser/ui/panel/tab.component.ts b/src/sql/base/browser/ui/panel/tab.component.ts
index 0cca4bc2c0..3761f2d765 100644
--- a/src/sql/base/browser/ui/panel/tab.component.ts
+++ b/src/sql/base/browser/ui/panel/tab.component.ts
@@ -25,7 +25,7 @@ export type TabType = 'tab' | 'group-header';
 export class TabComponent implements OnDestroy {
 	private _child?: TabChild;
 	@ContentChild(TemplateRef) templateRef!: TemplateRef<any>;
-	@Input() public title!: string;
+	@Input() public title?: string;
 	@Input() public canClose!: boolean;
 	@Input() public actions?: Array<Action>;
 	@Input() public iconClass?: string;
diff --git a/src/sql/base/browser/ui/scrollableView/scrollableView.ts b/src/sql/base/browser/ui/scrollableView/scrollableView.ts
index f5c3eb7800..d77b89eecf 100644
--- a/src/sql/base/browser/ui/scrollableView/scrollableView.ts
+++ b/src/sql/base/browser/ui/scrollableView/scrollableView.ts
@@ -102,7 +102,7 @@ export class ScrollableView extends Disposable {
 			height: typeof height === 'number' ? height : DOM.getContentHeight(this.domNode)
 		};
 
-		this.renderHeight = scrollDimensions.height;
+		this.renderHeight = scrollDimensions.height!;
 
 		this.width = width ?? DOM.getContentWidth(this.domNode);
 
@@ -110,7 +110,7 @@ export class ScrollableView extends Disposable {
 
 		if (this.scrollableElementUpdateDisposable) {
 			this.scrollableElementUpdateDisposable.dispose();
-			this.scrollableElementUpdateDisposable = null;
+			this.scrollableElementUpdateDisposable = undefined;
 			scrollDimensions.scrollHeight = this.scrollHeight;
 		}
 
@@ -120,7 +120,7 @@ export class ScrollableView extends Disposable {
 	setScrollTop(scrollTop: number): void {
 		if (this.scrollableElementUpdateDisposable) {
 			this.scrollableElementUpdateDisposable.dispose();
-			this.scrollableElementUpdateDisposable = null;
+			this.scrollableElementUpdateDisposable = undefined;
 			this.scrollableElement.setScrollDimensions({ scrollHeight: this.scrollHeight });
 		}
 
@@ -136,7 +136,7 @@ export class ScrollableView extends Disposable {
 
 	public addViews(views: IView[]): void { // @todo anthonydresser add ability to splice into the middle of the list and remove a particular index
 		const lastRenderRange = this.getRenderRange(this.lastRenderTop, this.lastRenderHeight);
-		const items = views.map(view => ({ size: view.minimumSize, view, disposables: [], index: 0 }));
+		const items: IItem[] = views.map(view => ({ size: view.minimumSize, view, disposables: [], index: 0 }));
 
 		items.map(i => i.disposables.push(i.view.onDidChange(() => this.rerender(this.getRenderRange(this.lastRenderTop, this.lastRenderHeight)))));
 
@@ -256,7 +256,7 @@ export class ScrollableView extends Disposable {
 
 	// DOM operations
 
-	private insertItemInDOM(index: number, beforeElement: HTMLElement | null): void {
+	private insertItemInDOM(index: number, beforeElement: HTMLElement | undefined): void {
 		const item = this.items[index];
 
 		if (!item.domNode) {
@@ -298,29 +298,29 @@ export class ScrollableView extends Disposable {
 	private removeItemFromDOM(index: number): void {
 		const item = this.items[index];
 
-		if (item) {
+		if (item && item.domNode) {
 			item.domNode.remove();
 			item.onDidInsertDisposable?.dispose();
 			if (item.view.onDidRemove) {
 				item.onDidRemoveDisposable = DOM.scheduleAtNextAnimationFrame(() => {
 					// we don't trust the items to be performant so don't interrupt our operations
-					item.view.onDidRemove();
+					item.view.onDidRemove!();
 				});
 			}
 		}
 	}
 
-	private getNextToLastElement(ranges: IRange[]): HTMLElement | null {
+	private getNextToLastElement(ranges: IRange[]): HTMLElement | undefined {
 		const lastRange = ranges[ranges.length - 1];
 
 		if (!lastRange) {
-			return null;
+			return undefined;
 		}
 
 		const nextToLastItem = this.items[lastRange.end];
 
 		if (!nextToLastItem) {
-			return null;
+			return undefined;
 		}
 
 		return nextToLastItem.domNode;
@@ -333,7 +333,7 @@ export class ScrollableView extends Disposable {
 		if (!this.scrollableElementUpdateDisposable) {
 			this.scrollableElementUpdateDisposable = DOM.scheduleAtNextAnimationFrame(() => {
 				this.scrollableElement.setScrollDimensions({ scrollHeight: this.scrollHeight });
-				this.scrollableElementUpdateDisposable = null;
+				this.scrollableElementUpdateDisposable = undefined;
 			});
 		}
 	}
diff --git a/src/sql/base/browser/ui/selectBox/selectBox.ts b/src/sql/base/browser/ui/selectBox/selectBox.ts
index 6230588a59..71dc09558c 100644
--- a/src/sql/base/browser/ui/selectBox/selectBox.ts
+++ b/src/sql/base/browser/ui/selectBox/selectBox.ts
@@ -68,7 +68,9 @@ export class SelectBox extends vsSelectBox {
 		let optionItems: SelectOptionItemSQL[] = SelectBox.createOptions(options);
 		super(optionItems, 0, contextViewProvider, undefined, selectBoxOptions);
 
+		this._optionsDictionary = new Map<string, number>();
 		this.populateOptionsDictionary(optionItems);
+		this._dialogOptions = optionItems;
 		const option = this._optionsDictionary.get(selectedOption);
 		if (option) {
 			super.select(option);
@@ -144,7 +146,7 @@ export class SelectBox extends vsSelectBox {
 	}
 
 	public populateOptionsDictionary(options: SelectOptionItemSQL[]) {
-		this._optionsDictionary = new Map<string, number>();
+		this._optionsDictionary.clear();
 		for (let i = 0; i < options.length; i++) {
 			this._optionsDictionary.set(options[i].value, i);
 		}
@@ -198,7 +200,7 @@ export class SelectBox extends vsSelectBox {
 	}
 
 	public get label(): string | undefined {
-		return this._dialogOptions.find(s => s.value === this._selectedOption).text;
+		return this._dialogOptions?.find(s => s.value === this._selectedOption)?.text;
 	}
 
 	public get values(): string[] {
diff --git a/src/sql/base/browser/ui/table/highPerf/tableWidget.ts b/src/sql/base/browser/ui/table/highPerf/tableWidget.ts
index 670921962d..8d6c8ecfce 100644
--- a/src/sql/base/browser/ui/table/highPerf/tableWidget.ts
+++ b/src/sql/base/browser/ui/table/highPerf/tableWidget.ts
@@ -482,7 +482,7 @@ export class MouseController<T> implements IDisposable {
 		if (document.activeElement !== e.browserEvent.target) {
 			this.table.domFocus();
 		}
-		const merger = (lastEvent: ITableMouseEvent<T>, currentEvent: MouseEvent): ITableMouseEvent<T> => {
+		const merger = (lastEvent: ITableMouseEvent<T> | null, currentEvent: MouseEvent): ITableMouseEvent<T> => {
 			return this.view.toMouseEvent(currentEvent);
 		};
 		this._mouseMoveMonitor.startMonitoring(e.browserEvent.target as HTMLElement, e.buttons, merger, e => this.onMouseMove(e), () => this.onMouseStop());
diff --git a/src/sql/base/browser/ui/table/plugins/buttonColumn.plugin.ts b/src/sql/base/browser/ui/table/plugins/buttonColumn.plugin.ts
index 99cbb8a0ed..20b0849ed9 100644
--- a/src/sql/base/browser/ui/table/plugins/buttonColumn.plugin.ts
+++ b/src/sql/base/browser/ui/table/plugins/buttonColumn.plugin.ts
@@ -27,7 +27,7 @@ export interface ButtonClickEventArgs<T extends Slick.SlickData> {
 export class ButtonColumn<T extends Slick.SlickData> implements Slick.Plugin<T> {
 	private _handler = new Slick.EventHandler();
 	private _definition: ButtonColumnDefinition<T>;
-	private _grid: Slick.Grid<T>;
+	private _grid!: Slick.Grid<T>;
 	private _onClick = new Emitter<ButtonClickEventArgs<T>>();
 	public onClick = this._onClick.event;
 
diff --git a/src/sql/base/browser/ui/table/plugins/textWithIconColumn.ts b/src/sql/base/browser/ui/table/plugins/textWithIconColumn.ts
index 023c0670cf..f4cd02dbb6 100644
--- a/src/sql/base/browser/ui/table/plugins/textWithIconColumn.ts
+++ b/src/sql/base/browser/ui/table/plugins/textWithIconColumn.ts
@@ -37,7 +37,7 @@ export class TextWithIconColumn<T extends Slick.SlickData> {
 	}
 	private formatter(row: number, cell: number, value: any, columnDef: Slick.Column<T>, dataContext: T): string {
 		const iconColumn = columnDef as TextWithIconColumnDefinition<T>;
-		return `<div class="icon codicon slick-icon-cell-content ${dataContext[iconColumn.iconCssClassField]}">${value}</div>`;
+		return `<div class="icon codicon slick-icon-cell-content ${iconColumn.iconCssClassField ? dataContext[iconColumn.iconCssClassField] : ''}">${value}</div>`;
 	}
 
 	public get definition(): TextWithIconColumnDefinition<T> {
diff --git a/src/sql/base/browser/ui/taskbar/overflowActionbar.ts b/src/sql/base/browser/ui/taskbar/overflowActionbar.ts
index 0b7267a86e..35951b0f8f 100644
--- a/src/sql/base/browser/ui/taskbar/overflowActionbar.ts
+++ b/src/sql/base/browser/ui/taskbar/overflowActionbar.ts
@@ -26,9 +26,9 @@ const defaultOptions: IActionBarOptions = {
 export class OverflowActionBar extends ActionBar {
 	// Elements
 	private _overflow: HTMLElement;
-	private _moreItemElement: HTMLElement;
-	private _moreActionsElement: HTMLElement;
-	private _previousWidth: number;
+	private _moreItemElement?: HTMLElement;
+	private _moreActionsElement?: HTMLElement;
+	private _previousWidth: number = 0;
 
 	constructor(container: HTMLElement, options: IActionBarOptions = defaultOptions) {
 		super(container, options);
@@ -74,7 +74,7 @@ export class OverflowActionBar extends ActionBar {
 				this.createMoreItemElement();
 			}
 
-			this._moreItemElement.style.display = 'block';
+			this._moreItemElement!.style.display = 'block';
 			while (width < fullWidth) {
 				let index = this._actionsList.childNodes.length - 2; // remove the last toolbar action before the more actions '...'
 				if (index > -1) {
@@ -94,7 +94,7 @@ export class OverflowActionBar extends ActionBar {
 					this.collapseItem();
 					break;
 				} else if (!this._overflow.hasChildNodes()) {
-					this._moreItemElement.style.display = 'none';
+					this._moreItemElement!.style.display = 'none';
 				}
 			}
 		}
@@ -117,23 +117,26 @@ export class OverflowActionBar extends ActionBar {
 
 		// change role to menuItem when it's in the overflow
 		if ((<HTMLElement>this._overflow.firstChild).className !== 'taskbarSeparator') {
-			(<HTMLElement>this._overflow.firstChild.firstChild).setAttribute('role', 'menuItem');
+			(<HTMLElement>this._overflow.firstChild!.firstChild).setAttribute('role', 'menuItem');
 		}
 	}
 
 	public restoreItem(): void {
-		let item = this._overflow.removeChild(this._overflow.firstChild);
-		// change role back to button when it's in the toolbar
-		if ((<HTMLElement>item).className !== 'taskbarSeparator') {
-			(<HTMLElement>item.firstChild).setAttribute('role', 'button');
-		}
-		this._actionsList.insertBefore(item, this._actionsList.lastChild);
+		let firstChild = this._overflow.firstChild;
+		if (firstChild) {
+			let item = this._overflow.removeChild(firstChild);
+			// change role back to button when it's in the toolbar
+			if ((<HTMLElement>item).className !== 'taskbarSeparator') {
+				(<HTMLElement>item.firstChild).setAttribute('role', 'button');
+			}
+			this._actionsList.insertBefore(item, this._actionsList.lastChild);
 
-		// move placeholder in this._items if item isn't a separator
-		if (!(<HTMLElement>item).classList.contains('taskbarSeparator')) {
-			let placeHolderIndex = this._items.findIndex(i => i === undefined);
-			let placeHolderItem = this._items.splice(placeHolderIndex, 1);
-			this._items.splice(placeHolderIndex + 1, 0, placeHolderItem[0]);
+			// move placeholder in this._items if item isn't a separator
+			if (!(<HTMLElement>item).classList.contains('taskbarSeparator')) {
+				let placeHolderIndex = this._items.findIndex(i => i === undefined);
+				let placeHolderItem = this._items.splice(placeHolderIndex, 1);
+				this._items.splice(placeHolderIndex + 1, 0, placeHolderItem[0]);
+			}
 		}
 	}
 
@@ -163,7 +166,7 @@ export class OverflowActionBar extends ActionBar {
 			// Close overflow if Escape is pressed
 			if (event.equals(KeyCode.Escape)) {
 				this.hideOverflowDisplay();
-				this._moreActionsElement.focus();
+				this._moreActionsElement!.focus();
 			} else if (event.equals(KeyCode.UpArrow)) {
 				// up arrow on first element in overflow should move focus to the bottom of the overflow
 				if (this._focusedItem === this._actionsList.childElementCount) {
@@ -192,7 +195,7 @@ export class OverflowActionBar extends ActionBar {
 
 		this._moreItemElement.appendChild(this._moreActionsElement);
 		this._actionsList.appendChild(this._moreItemElement);
-		this._items.push(undefined); // add place holder for more item element
+		this._items.push(undefined!); // add place holder for more item element @anthonydresser, im not sure how this is working, vscode indexes into this value all the time...
 	}
 
 	public moreElementOnClick(event: MouseEvent | StandardKeyboardEvent): void {
@@ -324,7 +327,7 @@ export class OverflowActionBar extends ActionBar {
 			if (i === this._focusedItem) {
 				// placeholder for location of moreActionsElement
 				if (!actionItem) {
-					this._moreActionsElement.focus();
+					this._moreActionsElement!.focus();
 				}
 				else if (types.isFunction(actionItem.focus)) {
 					actionItem.focus();
@@ -362,7 +365,7 @@ export class OverflowActionBar extends ActionBar {
 		return this._overflow;
 	}
 
-	public get focusedItem(): number {
+	public get focusedItem(): number | undefined {
 		return this._focusedItem;
 	}
 }
diff --git a/src/sql/base/test/browser/ui/scrollableView/scrollableView.test.ts b/src/sql/base/test/browser/ui/scrollableView/scrollableView.test.ts
index e30080ef28..ea9e6e2c54 100644
--- a/src/sql/base/test/browser/ui/scrollableView/scrollableView.test.ts
+++ b/src/sql/base/test/browser/ui/scrollableView/scrollableView.test.ts
@@ -20,7 +20,7 @@ class TestView extends Disposable implements IView {
 		this._onDidLayout.fire({ height, width });
 	}
 
-	private _size: number;
+	private _size: number = 0;
 	public get size(): number {
 		return this._size;
 	}
@@ -135,7 +135,7 @@ suite('ScrollableView', () => {
 
 		assert.equal(view1.size, 100, 'view1 is minimum size');
 		assert.equal(view2.size, 100, 'view2 is minimum size');
-		assert.equal(view3.size, undefined, 'view3 should not have been layout yet');
+		assert.equal(view3.size, 0, 'view3 should not have been layout yet');
 	});
 
 	test('reacts to changes in views', async () => {
@@ -157,7 +157,7 @@ suite('ScrollableView', () => {
 
 		assert.equal(view1.size, 130, 'view1 should be 130');
 		assert.equal(view2.size, 100, 'view2 should still be minimum size');
-		assert.equal(view3.size, undefined, 'view3 should not have been layout yet');
+		assert.equal(view3.size, 0, 'view3 should not have been layout yet');
 	});
 
 	test('programmatically scrolls', async () => {
@@ -174,7 +174,7 @@ suite('ScrollableView', () => {
 
 		assert.equal(view1.size, 100, 'view1 is minimum size');
 		assert.equal(view2.size, 100, 'view2 is minimum size');
-		assert.equal(view3.size, undefined, 'view3 should not have been layout yet');
+		assert.equal(view3.size, 0, 'view3 should not have been layout yet');
 		assert.equal(getViewChildren(container).length, 2, 'only 2 views are rendered');
 
 		scrollableView.setScrollTop(100);
diff --git a/src/sql/base/test/browser/ui/selectBox/selectBox.test.ts b/src/sql/base/test/browser/ui/selectBox/selectBox.test.ts
index 6ebfaa4d33..468b28d961 100644
--- a/src/sql/base/test/browser/ui/selectBox/selectBox.test.ts
+++ b/src/sql/base/test/browser/ui/selectBox/selectBox.test.ts
@@ -16,13 +16,13 @@ const options: SelectOptionItemSQL[] = [
 suite('Select Box tests', () => {
 	test('default value', () => {
 
-		const sb = new SelectBox(options, options[1].value, undefined, undefined, undefined);
+		const sb = new SelectBox(options, options[1].value, undefined!, undefined!, undefined!);
 
 		assert(sb.value === options[1].value);
 	});
 
 	test('values change', () => {
-		const sb = new SelectBox(options, options[1].value, undefined, undefined, undefined);
+		const sb = new SelectBox(options, options[1].value, undefined!, undefined!, undefined!);
 		const newOptions = deepClone(options);
 		{
 			const moreOptions: SelectOptionItemSQL[] = [
@@ -38,7 +38,7 @@ suite('Select Box tests', () => {
 	});
 
 	test('the selected option changes', () => {
-		const sb = new SelectBox(options, options[1].value, undefined, undefined, undefined);
+		const sb = new SelectBox(options, options[1].value, undefined!, undefined!, undefined!);
 
 		sb.onSelect({
 			index: 0,
@@ -50,16 +50,16 @@ suite('Select Box tests', () => {
 	});
 
 	test('values get auto populated', () => {
-		const newOptions = deepClone(options).map(s => { return { text: s.text, value: undefined }; });
-		const sb = new SelectBox(newOptions, undefined, undefined, undefined, undefined);
+		const newOptions = deepClone(options).map(s => { return { text: s.text, value: s.text }; });
+		const sb = new SelectBox(newOptions, undefined!, undefined!, undefined!, undefined!);
 
 		assert(equals(sb.values, newOptions.map(s => s.text)));
 	});
 
 	test('value did not contain label', () => {
-		const newOptions = deepClone(options).map(s => { return { text: s.text, value: undefined }; });
+		const newOptions = deepClone(options).map(s => { return { text: s.text, value: s.text }; });
 		delete newOptions[0].text;
-		const sb = new SelectBox(newOptions, undefined, undefined, undefined, undefined);
+		const sb = new SelectBox(newOptions, undefined!, undefined!, undefined!, undefined!);
 
 
 		sb.onSelect({
diff --git a/src/sql/platform/accounts/common/accountActions.ts b/src/sql/platform/accounts/common/accountActions.ts
index 24087653da..c0b7888f45 100644
--- a/src/sql/platform/accounts/common/accountActions.ts
+++ b/src/sql/platform/accounts/common/accountActions.ts
@@ -58,6 +58,7 @@ export class AddAccountAction extends Action {
 				this.logService.error(`Error while adding account: ${err}`);
 				this._addAccountErrorEmitter.fire(err);
 				this._addAccountCompleteEmitter.fire();
+				return false;
 			}));
 	}
 }
diff --git a/src/sql/platform/accounts/test/common/testAccountManagementService.ts b/src/sql/platform/accounts/test/common/testAccountManagementService.ts
index 2800464214..fa12fcc7ef 100644
--- a/src/sql/platform/accounts/test/common/testAccountManagementService.ts
+++ b/src/sql/platform/accounts/test/common/testAccountManagementService.ts
@@ -56,7 +56,7 @@ export class TestAccountManagementService implements IAccountManagementService {
 	}
 
 	getAccountSecurityToken(account: azdata.Account, tenant: string, resource: azdata.AzureResource): Thenable<{ token: string }> {
-		return Promise.resolve(undefined);
+		return Promise.resolve(undefined!);
 	}
 
 	removeAccount(accountKey: azdata.AccountKey): Thenable<boolean> {
@@ -105,7 +105,7 @@ export class AccountProviderStub implements azdata.AccountProvider {
 	}
 
 	getAccountSecurityToken(account: azdata.Account, tenant: string, resource: azdata.AzureResource): Thenable<{ token: string }> {
-		return Promise.resolve(undefined);
+		return Promise.resolve(undefined!);
 	}
 	initialize(storedAccounts: azdata.Account[]): Thenable<azdata.Account[]> {
 		return Promise.resolve(storedAccounts);
diff --git a/src/sql/platform/connection/test/common/connectionProfile.test.ts b/src/sql/platform/connection/test/common/connectionProfile.test.ts
index 712f37eadc..6f2b621e7e 100644
--- a/src/sql/platform/connection/test/common/connectionProfile.test.ts
+++ b/src/sql/platform/connection/test/common/connectionProfile.test.ts
@@ -187,7 +187,7 @@ suite('SQL ConnectionProfileInfo tests', () => {
 	});
 
 	test('createFromStoredProfile should set the id to new guid if not set in stored profile', () => {
-		let savedProfile = assign({}, storedProfile, { id: undefined });
+		let savedProfile: IConnectionProfileStore = assign({}, storedProfile, { id: undefined });
 		let connectionProfile = ConnectionProfile.createFromStoredProfile(savedProfile, capabilitiesService);
 		assert.equal(savedProfile.groupId, connectionProfile.groupId);
 		assert.deepEqual(savedProfile.providerName, connectionProfile.providerName);
diff --git a/src/sql/platform/connection/test/common/testConfigurationService.ts b/src/sql/platform/connection/test/common/testConfigurationService.ts
index f473adbf4a..0b7b5529a1 100644
--- a/src/sql/platform/connection/test/common/testConfigurationService.ts
+++ b/src/sql/platform/connection/test/common/testConfigurationService.ts
@@ -33,14 +33,16 @@ export class TestConfigurationService implements IConfigurationService {
 		let _target: 'user' | 'workspace' = (target as ConfigurationTarget) === ConfigurationTarget.USER ? 'user' : 'workspace';
 		let keyArray = key.split('.');
 		let targetObject = this.configuration[_target];
-		for (let i = 0; i < keyArray.length; i++) {
-			if (i === keyArray.length - 1) {
-				targetObject[keyArray[i]] = value;
-			} else {
-				if (!targetObject[keyArray[i]]) {
-					targetObject[keyArray[i]] = {};
+		if (targetObject) {
+			for (let i = 0; i < keyArray.length; i++) {
+				if (i === keyArray.length - 1) {
+					targetObject![keyArray[i]] = value;
+				} else {
+					if (!targetObject![keyArray[i]]) {
+						targetObject![keyArray[i]] = {};
+					}
+					targetObject = targetObject![keyArray[i]];
 				}
-				targetObject = targetObject[keyArray[i]];
 			}
 		}
 		return Promise.resolve(void 0);
diff --git a/src/sql/platform/connection/test/common/testConnectionManagementService.ts b/src/sql/platform/connection/test/common/testConnectionManagementService.ts
index 52edf4001b..19630a7980 100644
--- a/src/sql/platform/connection/test/common/testConnectionManagementService.ts
+++ b/src/sql/platform/connection/test/common/testConnectionManagementService.ts
@@ -260,7 +260,7 @@ export class TestConnectionManagementService implements IConnectionManagementSer
 	}
 
 	getConnectionCredentials(profileId: string): Promise<{ [name: string]: string }> {
-		return Promise.resolve(undefined);
+		return Promise.resolve(undefined!);
 	}
 
 	getServerInfo(profileId: string): azdata.ServerInfo {
diff --git a/src/sql/platform/opener/common/openerServiceStub.ts b/src/sql/platform/opener/common/openerServiceStub.ts
index eb93513f80..2c0dda3bdb 100644
--- a/src/sql/platform/opener/common/openerServiceStub.ts
+++ b/src/sql/platform/opener/common/openerServiceStub.ts
@@ -3,15 +3,26 @@
  *  Licensed under the Source EULA. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 import { URI } from 'vs/base/common/uri';
-import { IOpenerService } from 'vs/platform/opener/common/opener';
+import { IOpenerService, IOpener, IValidator, IExternalUriResolver, IExternalOpener, ResolveExternalUriOptions, IResolvedExternalUri } from 'vs/platform/opener/common/opener';
+import { IDisposable } from 'vs/base/common/lifecycle';
 
 
 export class OpenerServiceStub implements IOpenerService {
+	registerOpener(opener: IOpener): IDisposable {
+		throw new Error('Method not implemented.');
+	}
+	registerValidator(validator: IValidator): IDisposable {
+		throw new Error('Method not implemented.');
+	}
+	registerExternalUriResolver(resolver: IExternalUriResolver): IDisposable {
+		throw new Error('Method not implemented.');
+	}
+	setExternalOpener(opener: IExternalOpener): void {
+		throw new Error('Method not implemented.');
+	}
+	resolveExternalUri(resource: URI, options?: ResolveExternalUriOptions): Promise<IResolvedExternalUri> {
+		throw new Error('Method not implemented.');
+	}
 	_serviceBrand: undefined;
-	registerOpener() { return undefined; }
-	registerValidator() { return undefined; }
-	registerExternalUriResolver() { return undefined; }
-	setExternalOpener() { return undefined; }
 	async open(resource: URI | string, options?: any): Promise<boolean> { return Promise.resolve(true); }
-	async resolveExternalUri(uri: any) { return undefined; }
 }
diff --git a/src/sql/platform/serialization/common/serializationService.ts b/src/sql/platform/serialization/common/serializationService.ts
index e26e3b4741..b7ecdbebee 100644
--- a/src/sql/platform/serialization/common/serializationService.ts
+++ b/src/sql/platform/serialization/common/serializationService.ts
@@ -157,7 +157,7 @@ export class SerializationService implements ISerializationService {
 
 	private createStartRequest(serializationRequest: SerializeDataParams, index: number): azdata.SerializeDataStartRequestParams {
 		let batchSize = getBatchSize(serializationRequest.rowCount, index);
-		let rows = serializationRequest.getRowRange(index, serializationRequest.includeHeaders, batchSize);
+		let rows = serializationRequest.getRowRange(index, serializationRequest.includeHeaders ?? false, batchSize);
 		let columns: azdata.SimpleColumnInfo[] = serializationRequest.columns.map(c => {
 			// For now treat all as strings. In the future, would like to use the
 			// type info for correct data type mapping
@@ -186,7 +186,7 @@ export class SerializationService implements ISerializationService {
 
 	private createContinueRequest(serializationRequest: SerializeDataParams, index: number): azdata.SerializeDataContinueRequestParams {
 		let numberOfRows = getBatchSize(serializationRequest.rowCount, index);
-		let rows = serializationRequest.getRowRange(index, serializationRequest.includeHeaders, numberOfRows);
+		let rows = serializationRequest.getRowRange(index, serializationRequest.includeHeaders ?? false, numberOfRows);
 		let isLastBatch = index + rows.length >= serializationRequest.rowCount;
 		let continueSerializeRequest: azdata.SerializeDataContinueRequestParams = {
 			filePath: serializationRequest.filePath,
diff --git a/src/sql/workbench/contrib/assessment/test/browser/asmtActions.test.ts b/src/sql/workbench/contrib/assessment/test/browser/asmtActions.test.ts
index cef25c43f5..395ccec0c9 100644
--- a/src/sql/workbench/contrib/assessment/test/browser/asmtActions.test.ts
+++ b/src/sql/workbench/contrib/assessment/test/browser/asmtActions.test.ts
@@ -263,4 +263,3 @@ suite('Assessment Actions', () => {
 		notificationService.verify(s => s.prompt(TypeMoq.It.isAny(), TypeMoq.It.isAny(), TypeMoq.It.isAny()), TypeMoq.Times.once());
 	});
 });
-
diff --git a/src/tsconfig.vscode.json b/src/tsconfig.vscode.json
index c6ca3cdb7b..6819cd7f55 100644
--- a/src/tsconfig.vscode.json
+++ b/src/tsconfig.vscode.json
@@ -7,7 +7,10 @@
 		"noUnusedLocals": true,
 		"strict": true,
 		"forceConsistentCasingInFileNames": true,
-		"skipLibCheck": true
+		"strictNullChecks": true,
+		"strictPropertyInitialization": true,
+		"skipLibCheck": true,
+		"noImplicitAny": true
 	},
 	"include": [
 		"./typings",
@@ -20,12 +23,12 @@
 		// "./vs/code/**/*.ts",
 		"./vs/editor/**/*.ts",
 		"./vs/platform/**/*.ts",
-		"./vs/workbench/contrib/debug/common/debugProtocol.d.ts",
-		"./vs/workbench/services/**/*.ts",
-		"./sql/workbench/services/**/*.ts",
+		// "./vs/workbench/contrib/debug/common/debugProtocol.d.ts",
+		// "./vs/workbench/services/**/*.ts",
 		"./sql/base/**/*.ts",
 		"./sql/editor/**/*.ts",
-		"./sql/platform/**/*.ts"
+		"./sql/platform/**/*.ts",
+		// "./sql/workbench/services/**/*.ts"
 	],
 	"exclude": [
 		"./vs/platform/workspaces/test/electron-main/workspacesMainService.test.ts",