Minimum in-proc SDK for core tools

Author: mattchenderson

articles/azure-functions/functions-develop-vs.md

@@ -219,6 +219,13 @@ For a full list of the bindings supported by Functions, see [Supported bindings]
 
 Azure Functions Core Tools lets you run Azure Functions project on your local development computer. When you press F5 to debug a Functions project, the local Functions host (func.exe) starts to listen on a local port (usually 7071). Any callable function endpoints are written to the output, and you can use these endpoints for testing your functions. For more information, see [Work with Azure Functions Core Tools](functions-run-local.md). You're prompted to install these tools the first time you start a function from Visual Studio.
 
+::: zone pivot="in-proc" 
+
+> [!IMPORTANT]
+> Starting with version 4.0.6517 of the Core Tools, in-process model projects must reference [version 4.5.0 or later of `Microsoft.NET.Sdk.Functions`](https://www.nuget.org/packages/Microsoft.NET.Sdk.Functions/4.5.0). If an earlier version is used, the `func start` command will error.
+
+::: zone-end  
+
 To start your function in Visual Studio in debug mode:
 
 1. Press F5. If prompted, accept the request from Visual Studio to download and install Azure Functions Core (CLI) tools. You might also need to enable a firewall exception so that the tools can handle HTTP requests.

articles/azure-functions/functions-dotnet-class-library.md

@@ -226,10 +226,13 @@ The following example shows the relevant parts of the `.csproj` files that have
   <AzureFunctionsVersion>v4</AzureFunctionsVersion>
 </PropertyGroup>
 <ItemGroup>
-  <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.4.0" />
+  <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.5.0" />
 </ItemGroup>
 ```
 
+> [!IMPORTANT]
+> Starting with version 4.0.6517 of the Core Tools, in-process model projects must reference [version 4.5.0 or later of `Microsoft.NET.Sdk.Functions`](https://www.nuget.org/packages/Microsoft.NET.Sdk.Functions/4.5.0). If an earlier version is used, the `func start` command will error.
+
 # [v1.x](#tab/v1)
 
 ```xml

articles/azure-functions/functions-run-local.md

@@ -55,15 +55,15 @@ For help with version-related issues, see [Core Tools versions](#v2).
 In the terminal window or from a command prompt, run the following command to create a project in the `MyProjFolder` folder:
 
 ::: zone pivot="programming-language-csharp"
-### [Isolated process](#tab/isolated-process)
+### [Isolated worker model](#tab/isolated-process)
 
 ```console
 func init MyProjFolder --worker-runtime dotnet-isolated 
 ```
 
 By default this command creates a project that runs in-process with the Functions host on the current [Long-Term Support (LTS) version of .NET Core]. You can use the `--target-framework` option to target a specific supported version of .NET, including .NET Framework. For more information, see the [`func init`](functions-core-tools-reference.md#func-init) reference.
 
-### [In-process](#tab/in-process)
+### [In-process model](#tab/in-process)
 
 ```console
 func init MyProjFolder --worker-runtime dotnet 
@@ -199,7 +199,27 @@ mvn clean package
 mvn azure-functions:run
 ```
 ::: zone-end  
-::: zone pivot="programming-language-csharp,programming-language-javascript,programming-language-powershell,programming-language-python"  
+::: zone pivot="programming-language-csharp"  
+
+### [Isolated worker model](#tab/isolated-process)
+
+```
+func start
+```
+
+### [In-process model](#tab/in-process)
+
+```
+func start
+```
+
+> [!IMPORTANT]
+> Starting with version 4.0.6517 of the Core Tools, in-process model projects must reference [version 4.5.0 or later of `Microsoft.NET.Sdk.Functions`](https://www.nuget.org/packages/Microsoft.NET.Sdk.Functions/4.5.0). If an earlier version is used, the `func start` command will error.
+
+---
+
+::: zone-end  
+::: zone pivot="programming-language-javascript,programming-language-powershell,programming-language-python"  
 ```
 func start
 ```
@@ -513,6 +533,11 @@ If you must use a binding extension or an extension version not in a supported b
 
 Major versions of Azure Functions Core Tools are linked to specific major versions of the Azure Functions runtime. For example, version 4.x of Core Tools supports version 4.x of the Functions runtime. This version is the recommended major version of both the Functions runtime and Core Tools. You can determine the latest release version of Core Tools in the [Azure Functions Core Tools repository](https://github.com/Azure/azure-functions-core-tools/releases/latest).
 
+::: zone pivot="programming-language-csharp"
+<a name="in-process-minimum-version"></a> 
+Starting with version 4.0.6517 of the Core Tools, in-process model projects must reference [version 4.5.0 or later of `Microsoft.NET.Sdk.Functions`](https://www.nuget.org/packages/Microsoft.NET.Sdk.Functions/4.5.0). If an earlier version is used, the `func start` command will error.
+::: zone-end
+
 Run the following command to determine the version of your current Core Tools installation:
 
 ```command