Removing FileSystemProviders.config.uninstall.xdt from the NuGet package as it causes the parameter values to be reset when upgrading the NuGet package. It can stay in the Umbraco package as this doesn't work in the same way.

It seems I can't have my cake and eat it.... :(

Author: Jeavon

build/UmbracoFileSystemProviders.Azure.proj

@@ -123,7 +123,10 @@
       <BinFiles Include="$(ProjectDir)\bin\$(BuildConfig)\Our.Umbraco.FileSystemProviders.Azure.dll" />
       <PdbFiles Include="$(ProjectDir)\bin\$(BuildConfig)\Our.Umbraco.FileSystemProviders.Azure.pdb" />
       <WebConfigXDTFiles Include="$(MSBuildProjectDirectory)\transforms\web.config.*.xdt" />
-      <FileSystemProvidersConfigXDTFiles Include="$(MSBuildProjectDirectory)\transforms\FileSystemProviders.config.*.xdt" />
+      <FileSystemProvidersConfigXDTInstallFile Include="$(MSBuildProjectDirectory)\transforms\FileSystemProviders.config.install.xdt" />
+
+      <!-- The FileSystemProviders.config.uninstall.xdt needs to be excluded from the NuGet package so that upgrades don't overwrite parameter values due to NuGet upgrades actually executing uninstall/install -->
+      <FileSystemProvidersConfigXDTUninstallFile Include="$(MSBuildProjectDirectory)\transforms\FileSystemProviders.config.uninstall.xdt" />
 
       <!-- Umbraco specific -->
       <!-- Newtonsoft.Json Excluded for now as Umbraco requires different major versions -->
@@ -143,7 +146,8 @@
     <Copy SourceFiles="@(InstallerBinFiles)" DestinationFolder="$(BuildUmbDir)\bin" />
     <Copy SourceFiles="@(UmbracoOtherBinFiles)" DestinationFolder="$(BuildUmbDir)\bin" />
     <Copy SourceFiles="@(WebConfigXDTFiles)" DestinationFolder="$(BuildUmbDir)\App_Plugins\UmbracoFileSystemProviders\Azure\Install" />
-    <Copy SourceFiles="@(FileSystemProvidersConfigXDTFiles)" DestinationFolder="$(BuildUmbDir)\App_Plugins\UmbracoFileSystemProviders\Azure\Install" />
+    <Copy SourceFiles="@(FileSystemProvidersConfigXDTInstallFile)" DestinationFolder="$(BuildUmbDir)\App_Plugins\UmbracoFileSystemProviders\Azure\Install" />
+    <Copy SourceFiles="@(FileSystemProvidersConfigXDTUninstallFile)" DestinationFolder="$(BuildUmbDir)\App_Plugins\UmbracoFileSystemProviders\Azure\Install" />
     <Copy SourceFiles="@(UmbracoInstallerFiles)" DestinationFiles="@(UmbracoInstallerFiles->'$(BuildUmbDir)\App_Plugins\UmbracoFileSystemProviders\Azure\Install\Configurator\%(RecursiveDir)%(Filename)%(Extension)')" />
     <Copy SourceFiles="@(UmbracoInstallerLogo)" DestinationFolder="$(BuildUmbDir)\App_Plugins\UmbracoFileSystemProviders\Azure\Install" />
     <Copy SourceFiles="@(PackageFile)" DestinationFolder="$(BuildUmbDir)" />
@@ -152,7 +156,7 @@
     <Copy SourceFiles="@(BinFiles)" DestinationFolder="$(BuildNuGetDir)\lib\net45" />
 		<Copy SourceFiles="@(PdbFiles)" DestinationFolder="$(BuildNuGetDir)\lib\net45" />    
     <Copy SourceFiles="@(WebConfigXDTFiles)" DestinationFolder="$(BuildNuGetDir)\Content" />
-    <Copy SourceFiles="@(FileSystemProvidersConfigXDTFiles)" DestinationFolder="$(BuildNuGetDir)\Content\Config" />
+    <Copy SourceFiles="@(FileSystemProvidersConfigXDTInstallFile)" DestinationFolder="$(BuildNuGetDir)\Content\Config" />
     <Copy SourceFiles="@(SrcFiles)" DestinationFiles="@(SrcFiles->'$(BuildNuGetDir)\src\%(RecursiveDir)%(Filename)%(Extension)')" />
     <Copy SourceFiles="@(NuSpecFile)" DestinationFolder="$(BuildNuGetDir)" />
   </Target>

build/transforms/FileSystemProviders.config.install.xdt

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <FileSystemProviders xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
 
-  <Provider alias="media" type="Umbraco.Core.IO.PhysicalFileSystem, Umbraco.Core"  xdt:Locator="Match(type)" xdt:Transform="Remove">
+  <Provider alias="media" type="Umbraco.Core.IO.PhysicalFileSystem, Umbraco.Core" xdt:Locator="Match(type)" xdt:Transform="Remove">
     <Parameters>
       <add key="virtualRoot" value="~/media/" />
     </Parameters>