diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index bbae4ecb698..6e0c412215d 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,12 +1,12 @@
 // For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
 {
     "name": "F#",
-    "image": "mcr.microsoft.com/dotnet/sdk:9.0.100",
+    "image": "mcr.microsoft.com/dotnet/sdk:9.0.102",
     "features": {
-        "ghcr.io/devcontainers/features/common-utils:2.5.1": {},
+        "ghcr.io/devcontainers/features/common-utils:2.5.2": {},
         "ghcr.io/devcontainers/features/git:1.3.2": {},
         "ghcr.io/devcontainers/features/github-cli:1.0.13": {},
-        "ghcr.io/devcontainers/features/dotnet:2.1.3": {}
+        "ghcr.io/devcontainers/features/dotnet:2.2.0": {}
     },
     "hostRequirements": {
         "cpus": 2,
diff --git a/docs/release-notes/.FSharp.Compiler.Service/9.0.300.md b/docs/release-notes/.FSharp.Compiler.Service/9.0.300.md
index 157b1af93cc..52b92207001 100644
--- a/docs/release-notes/.FSharp.Compiler.Service/9.0.300.md
+++ b/docs/release-notes/.FSharp.Compiler.Service/9.0.300.md
@@ -7,6 +7,8 @@
 * Added missing type constraints in FCS. ([PR #18241](https://github.com/dotnet/fsharp/pull/18241))
 
 ### Changed
+
+* FSharpCheckFileResults.ProjectContext.ProjectOptions will not be available when using the experimental Transparent Compiler feature. ([PR #18205](https://github.com/dotnet/fsharp/pull/18205))
 * Update `Obsolete` attribute checking to account for `DiagnosticId` and `UrlFormat` properties. ([PR #18224](https://github.com/dotnet/fsharp/pull/18224))
 
 ### Breaking Changes
diff --git a/eng/Versions.props b/eng/Versions.props
index 59f0f6e7cb9..3b36ad6a716 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -37,7 +37,7 @@
     <FSharpLibrariesChangelogVersion>$(FSMajorVersion).$(FSMinorVersion).$(FSBuildVersion)</FSharpLibrariesChangelogVersion>
     <!-- -->
     <!-- The current published nuget package -->
-    <FSharpCoreShippedPackageVersionValue>9.0.100</FSharpCoreShippedPackageVersionValue>
+    <FSharpCoreShippedPackageVersionValue>9.0.101</FSharpCoreShippedPackageVersionValue>
     <!-- -->
     <!-- The pattern for specifying the preview package -->
     <FSharpCorePreviewPackageVersionValue>$(FSCorePackageVersionValue)-$(PreReleaseVersionLabel).*</FSharpCorePreviewPackageVersionValue>
diff --git a/src/Compiler/Service/BackgroundCompiler.fs b/src/Compiler/Service/BackgroundCompiler.fs
index 63d147d005b..8f119f2fd60 100644
--- a/src/Compiler/Service/BackgroundCompiler.fs
+++ b/src/Compiler/Service/BackgroundCompiler.fs
@@ -1066,7 +1066,7 @@ type internal BackgroundCompiler
                         tcProj.TcGlobals,
                         options.IsIncompleteTypeCheckEnvironment,
                         Some builder,
-                        options,
+                        Some options,
                         Array.ofList tcDependencyFiles,
                         creationDiags,
                         parseResults.Diagnostics,
@@ -1248,7 +1248,7 @@ type internal BackgroundCompiler
                      tcEnvAtEnd.AccessRights,
                      tcAssemblyExprOpt,
                      Array.ofList tcDependencyFiles,
-                     options)
+                     Some options)
 
                 let results =
                     FSharpCheckProjectResults(
diff --git a/src/Compiler/Service/FSharpCheckerResults.fs b/src/Compiler/Service/FSharpCheckerResults.fs
index 1c7878c6df8..0d6e83a61c2 100644
--- a/src/Compiler/Service/FSharpCheckerResults.fs
+++ b/src/Compiler/Service/FSharpCheckerResults.fs
@@ -348,7 +348,7 @@ type internal TypeCheckInfo
         tcAccessRights: AccessorDomain,
         projectFileName: string,
         mainInputFileName: string,
-        projectOptions: FSharpProjectOptions,
+        projectOptions: FSharpProjectOptions option,
         sResolutions: TcResolutions,
         sSymbolUses: TcSymbolUses,
         sFallback: NameResolutionEnv,
@@ -3289,7 +3289,7 @@ module internal ParseAndCheckFile =
                     tcEnvAtEnd.AccessRights,
                     projectFileName,
                     mainInputFileName,
-                    projectOptions,
+                    Some projectOptions,
                     sink.GetResolutions(),
                     sink.GetSymbolUses(),
                     tcEnvAtEnd.NameEnv,
@@ -3302,9 +3302,14 @@ module internal ParseAndCheckFile =
         }
 
 [<Sealed>]
-type FSharpProjectContext(thisCcu: CcuThunk, assemblies: FSharpAssembly list, ad: AccessorDomain, projectOptions: FSharpProjectOptions) =
+type FSharpProjectContext
+    (thisCcu: CcuThunk, assemblies: FSharpAssembly list, ad: AccessorDomain, projectOptions: FSharpProjectOptions option) =
 
-    member _.ProjectOptions = projectOptions
+    // TODO: Once API around Transparent Compiler is stabilized we should probably remove this.
+    member _.ProjectOptions =
+        projectOptions
+        |> Option.defaultWith (fun () ->
+            failwith "ProjectOptions are not available. This is expected when using FSharpChecker with useTransparentCompiler=true.")
 
     member _.GetReferencedAssemblies() = assemblies
 
@@ -3713,7 +3718,7 @@ type FSharpCheckProjectResults
             AccessorDomain *
             CheckedImplFile list option *
             string[] *
-            FSharpProjectOptions) option
+            FSharpProjectOptions option) option
     ) =
 
     let getDetails () =
@@ -4009,7 +4014,7 @@ type FsiInteractiveChecker(legacyReferenceResolver, tcConfig: TcConfig, tcGlobal
                  tcState.TcEnvFromImpls.AccessRights,
                  None,
                  dependencyFiles,
-                 projectOptions)
+                 Some projectOptions)
 
             let projectResults =
                 FSharpCheckProjectResults(fileName, Some tcConfig, keepAssemblyContents, errors, Some details)
diff --git a/src/Compiler/Service/FSharpCheckerResults.fsi b/src/Compiler/Service/FSharpCheckerResults.fsi
index 6b0a7f49135..607232f3c92 100644
--- a/src/Compiler/Service/FSharpCheckerResults.fsi
+++ b/src/Compiler/Service/FSharpCheckerResults.fsi
@@ -454,7 +454,7 @@ type public FSharpCheckFileResults =
         tcGlobals: TcGlobals *
         isIncompleteTypeCheckEnvironment: bool *
         builder: IncrementalBuilder option *
-        projectOptions: FSharpProjectOptions *
+        projectOptions: FSharpProjectOptions option *
         dependencyFiles: string[] *
         creationErrors: FSharpDiagnostic[] *
         parseErrors: FSharpDiagnostic[] *
@@ -554,7 +554,7 @@ type public FSharpCheckProjectResults =
             AccessorDomain *
             CheckedImplFile list option *
             string[] *
-            FSharpProjectOptions) option ->
+            FSharpProjectOptions option) option ->
             FSharpCheckProjectResults
 
 module internal ParseAndCheckFile =
diff --git a/src/Compiler/Service/TransparentCompiler.fs b/src/Compiler/Service/TransparentCompiler.fs
index f25b75fe99d..9f35b4f2835 100644
--- a/src/Compiler/Service/TransparentCompiler.fs
+++ b/src/Compiler/Service/TransparentCompiler.fs
@@ -1696,7 +1696,7 @@ type internal TransparentCompiler
                             bootstrapInfo.TcGlobals,
                             projectSnapshot.IsIncompleteTypeCheckEnvironment,
                             None,
-                            projectSnapshot.ToOptions(),
+                            None,
                             Array.ofList tcInfo.tcDependencyFiles,
                             creationDiags,
                             parseResults.Diagnostics,
@@ -1963,7 +1963,7 @@ type internal TransparentCompiler
                          tcEnvAtEnd.AccessRights,
                          Some checkedImplFiles,
                          Array.ofList tcDependencyFiles,
-                         projectSnapshot.ToOptions())
+                         None)
 
                     let results =
                         FSharpCheckProjectResults(