IParameters: DefaultLocation property.

Author: sergey-shandar

src/ResourceManager/Common/Commands.Common.Strategies.UnitTest/AsyncCmdletExtensionsTest.cs

@@ -20,6 +20,8 @@ class RG { }
 
         class Parameters : IParameters<RG>
         {
+            public string DefaultLocation => "eastus";
+
             public string Location
             {
                 get

src/ResourceManager/Common/Commands.Common.Strategies/IParameters.cs

@@ -28,6 +28,11 @@ public interface IParameters<TModel>
         /// </summary>
         string Location { get; set; }
 
+        /// <summary>
+        /// Default location. It's used if Location is null and it can't be infered.
+        /// </summary>
+        string DefaultLocation { get; }
+
         /// <summary>
         /// Create an Azure resource configuration according to the parameters.
         /// </summary>

src/ResourceManager/Compute/Commands.Compute/Manual/VirtualMachineScaleSetCreateOrUpdateMethod.cs

@@ -146,6 +146,8 @@ public string Location
 
             public ImageAndOsType ImageAndOsType { get; set; }
 
+            public string DefaultLocation => "eastus";
+
             public async Task<ResourceConfig<VirtualMachineScaleSet>> CreateConfigAsync()
             {
                 ImageAndOsType = await _client.UpdateImageAndOsTypeAsync(

src/ResourceManager/Compute/Commands.Compute/VirtualMachine/Operation/NewAzureVMCommand.cs

@@ -260,6 +260,8 @@ public string Location
                 set { _cmdlet.Location = value; }
             }
 
+            public string DefaultLocation => "eastus";
+
             public BlobUri DestinationUri;
 
             public async Task<ResourceConfig<VirtualMachine>> CreateConfigAsync()