Update SaveAzureVhdCommand

Author: huangpf

src/CLU/Microsoft.Azure.Commands.Compute/StorageServices/SaveAzureVhdCommand.cs

@@ -54,15 +54,15 @@ public class SaveAzureVhdCommand : ComputeClientBaseCmdlet
             HelpMessage = "Uri to blob")]
         [ValidateNotNullOrEmpty]
         [Alias("src", "Source")]
-        public Uri SourceUri { get; set; }
+        public string SourceUri { get; set; }
 
         [Parameter(
             Position = 2,
             Mandatory = true,
             HelpMessage = "Local path of the vhd file")]
         [ValidateNotNullOrEmpty]
         [Alias("lf")]
-        public FileInfo LocalFilePath { get; set; }
+        public string LocalFilePath { get; set; }
 
         private int numberOfThreads = DefaultNumberOfUploaderThreads;
 
@@ -91,8 +91,8 @@ protected override void ProcessRecord()
         {
             var result = DownloadFromBlobUri(
                 this,
-                this.SourceUri,
-                this.LocalFilePath,
+                new Uri(this.SourceUri),
+                new FileInfo(this.LocalFilePath),
                 this.StorageKey,
                 this.ResourceGroupName,
                 this.NumberOfThreads,