Fix to only include non-empty ExtendedLocation (#22630)

* Fix to only include non-empty ExtendedLocation

* Updated ChangeLog.md

Author: myun12580

src/Network/Network/ChangeLog.md

@@ -25,6 +25,7 @@
 
 ## Version 6.1.1
 * Onboarded `Microsoft.ElasticSan/elasticSans` to private link cmdlets
+* Fixed bug in `New-AzVirtualNetworkGateway` to include only non-empty `ExtendedLocation`
 
 ## Version 6.1.0
 * Added new cmdlets to get Connection child resource of Network Virtual Appliance.

src/Network/Network/VirtualNetworkGateway/NewAzureVirtualNetworkGatewayCommand.cs

@@ -419,7 +419,7 @@ private PSVirtualNetworkGateway CreateVirtualNetworkGateway()
 
             }
             vnetGateway.GatewayType = this.GatewayType;
-            if (vnetGateway.GatewayType == "LocalGateway" || vnetGateway.GatewayType == "ExpressRoute")
+            if (this.ExtendedLocation != null && (vnetGateway.GatewayType == "LocalGateway" || vnetGateway.GatewayType == "ExpressRoute"))
             {
                 vnetGateway.ExtendedLocation = new PSExtendedLocation(this.ExtendedLocation);
                 vnetGateway.VNetExtendedLocationResourceId = this.VNetExtendedLocationResourceId;