[Compute] Implement whatif

src/Compute/Compute/Compute.csproj

@@ -22,6 +22,12 @@
     <PackageReference Include="System.Management" Version="4.5.0" />
     <!-- Include the following DLLs for security issue -->
     <PackageReference Include="System.Security.Cryptography.Xml" Version="4.7.1" />
+    <PackageReference Include="Azure.Identity" Version="1.11.4" />
+  </ItemGroup>
+
+  <!-- Include shared WhatIf library -->
+  <ItemGroup>
+    <Compile Include="..\..\shared\WhatIf\**\*.cs" LinkBase="Shared\WhatIf" />
   </ItemGroup>
 
   <ItemGroup>

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

@@ -499,6 +499,11 @@ public class NewAzureVMCommand : VirtualMachineBaseCmdlet
 
         public override void ExecuteCmdlet()
         {
+            // Handle DryRun early (before any real logic)
+            if (DryRun.IsPresent && TryHandleDryRun())
+            {
+                return;
+            }
 
             switch (ParameterSetName)
             {

src/Compute/Compute/VirtualMachine/Operation/UpdateAzureVMCommand.cs

@@ -203,6 +203,29 @@ public class UpdateAzureVMCommand : VirtualMachineBaseCmdlet
 
         public override void ExecuteCmdlet()
         {
+            // If DryRun requested, build flattened PS script including VM object assignment
+            if (DryRun.IsPresent)
+            {
+                try
+                {
+                    var vmJson = Newtonsoft.Json.JsonConvert.SerializeObject(this.VM, Newtonsoft.Json.Formatting.Indented);
+                    string escapedJson = vmJson.Replace("`", "``");
+                    string vmAssign = "$vm = ConvertFrom-Json @'\n" + escapedJson + "\n'@";
+                    if (TryHandleDryRun(vmAssign))
+                    {
+                        return;
+                    }
+                }
+                catch (Exception ex)
+                {
+                    WriteVerbose($"DryRun VM flatten failed: {ex.Message}. Falling back to default invocation capture.");
+                    if (TryHandleDryRun())
+                    {
+                        return;
+                    }
+                }
+            }
+
             if (this.IsParameterBound(c => c.UserData))
             {
                 if (!ValidateBase64EncodedString.ValidateStringIsBase64Encoded(this.UserData))
@@ -223,7 +246,6 @@ public override void ExecuteCmdlet()
             {
                 ExecuteClientAction(() =>
                 {
-
                     var parameters = new VirtualMachine
                     {
                         DiagnosticsProfile = this.VM.DiagnosticsProfile,
@@ -346,7 +368,7 @@ public override void ExecuteCmdlet()
                         parameters.SecurityProfile.EncryptionAtHost = this.EncryptionAtHost;
                     }
 
-                    if (this.IsParameterBound( c => c.SecurityType))
+                    if (this.IsParameterBound(c => c.SecurityType))
                     {
                         if (parameters.SecurityProfile == null)
                         {

src/Network/Network/Network.csproj

@@ -16,6 +16,11 @@
     <PackageReference Include="Microsoft.Azure.PowerShell.AutoMapper" Version="6.2.2" />
   </ItemGroup>
 
+  <!-- Add shared WhatIf library source files -->
+  <ItemGroup>
+    <Compile Include="..\..\shared\WhatIf\**\*.cs" LinkBase="Shared\WhatIf" />
+  </ItemGroup>
+
   <ItemGroup>
     <Compile Update="Properties\Resources.Designer.cs">
       <DesignTime>True</DesignTime>

src/Network/Network/VirtualNetwork/NewAzureVirtualNetworkCommand.cs

@@ -147,6 +147,12 @@ public class NewAzureVirtualNetworkCommand : VirtualNetworkBaseCmdlet
 
         public override void Execute()
         {
+            // Handle DryRun early: perform DryRun payload post and formatting only, skip real create logic
+            if (DryRun.IsPresent && TryHandleDryRun())
+            {
+                return; // do not proceed to actual creation
+            }
+
             base.Execute();
             var present = IsVirtualNetworkPresent(ResourceGroupName, Name);
             ConfirmAction(

src/Network/Network/VirtualNetwork/SetAzureVirtualNetworkCommand.cs

@@ -37,6 +37,29 @@ public class SetAzureVirtualNetworkCommand : VirtualNetworkBaseCmdlet
 
         public override void Execute()
         {
+            // DryRun support (modeled after UpdateAzureVMCommand): attempt to flatten PSVirtualNetwork into a PS assignment
+            if (DryRun.IsPresent)
+            {
+                try
+                {
+                    var vnetJson = Newtonsoft.Json.JsonConvert.SerializeObject(this.VirtualNetwork, Newtonsoft.Json.Formatting.Indented);
+                    string escapedJson = vnetJson.Replace("`", "``");
+                    string vnetAssign = "$virtualNetwork = ConvertFrom-Json @'\n" + escapedJson + "\n'@";
+                    if (TryHandleDryRun(vnetAssign))
+                    {
+                        return; // DryRun handled, do not execute real operation
+                    }
+                }
+                catch (Exception ex)
+                {
+                    WriteVerbose($"DryRun VirtualNetwork flatten failed: {ex.Message}. Falling back to default invocation capture.");
+                    if (TryHandleDryRun())
+                    {
+                        return;
+                    }
+                }
+            }
+
             base.Execute();
 
             if (!this.IsVirtualNetworkPresent(this.VirtualNetwork.ResourceGroupName, this.VirtualNetwork.Name))