Convert all possible DllImports to LibraryImport for .NET 7+

.editorconfig

@@ -77,6 +77,9 @@ charset = utf-8-bom
 
 [*.{cs,vb}]
 
+# SYSLIB1054: Use 'LibraryImportAttribute' instead of 'DllImportAttribute' to generate P/Invoke marshalling code at compile time
+dotnet_diagnostic.SYSLIB1054.severity = warning
+
 # CA1018: Mark attributes with AttributeUsageAttribute
 dotnet_diagnostic.CA1018.severity = warning
 

eng/tools/HelixTestRunner/HelixTestRunner.csproj

@@ -13,6 +13,7 @@
     <OutputType>Exe</OutputType>
     <NoWarn>$(NoWarn);CA2007;NU5104</NoWarn>
     <IsPackable>false</IsPackable>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 
     <!-- We don't need this unless building for tests. -->
     <ExcludeFromBuild Condition=" '$(DotNetBuildFromSource)' == 'true' OR '$(SkipTestBuild)' == 'true' ">true</ExcludeFromBuild>

eng/tools/HelixTestRunner/ProcessUtil.cs

@@ -15,10 +15,10 @@
 
 namespace HelixTestRunner;
 
-public static class ProcessUtil
+public static partial class ProcessUtil
 {
-    [DllImport("libc", SetLastError = true, EntryPoint = "kill")]
-    private static extern int sys_kill(int pid, int sig);
+    [LibraryImport("libc", SetLastError = true, EntryPoint = "kill")]
+    private static partial int sys_kill(int pid, int sig);
 
     public static Task CaptureDumpAsync()
     {

src/DataProtection/Cryptography.Internal/src/SafeHandles/SafeLibraryHandle.cs

@@ -13,7 +13,7 @@ namespace Microsoft.AspNetCore.Cryptography.SafeHandles;
 /// <summary>
 /// Represents a handle to a Windows module (DLL).
 /// </summary>
-internal sealed unsafe class SafeLibraryHandle : SafeHandleZeroOrMinusOneIsInvalid
+internal sealed unsafe partial class SafeLibraryHandle : SafeHandleZeroOrMinusOneIsInvalid
 {
     // Called by P/Invoke when returning SafeHandles
     private SafeLibraryHandle()
@@ -125,48 +125,74 @@ protected override bool ReleaseHandle()
     }
 
     [SuppressUnmanagedCodeSecurity]
-    private static class UnsafeNativeMethods
+    private static partial class UnsafeNativeMethods
     {
         // http://msdn.microsoft.com/en-us/library/windows/desktop/ms679351(v=vs.85).aspx
-        [DllImport("kernel32.dll", EntryPoint = "FormatMessageW", CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Unicode, SetLastError = true)]
+#if NET7_0_OR_GREATER
+        [LibraryImport("kernel32.dll", EntryPoint = "FormatMessageW", SetLastError = true)]
+        public static partial int FormatMessage(
+#else
+        [DllImport("kernel32.dll", EntryPoint = "FormatMessageW", SetLastError = true)]
         public static extern int FormatMessage(
-            [In] uint dwFlags,
-            [In] SafeLibraryHandle lpSource,
-            [In] uint dwMessageId,
-            [In] uint dwLanguageId,
-            [Out] out LocalAllocHandle lpBuffer,
-            [In] uint nSize,
-            [In] IntPtr Arguments
+#endif
+           uint dwFlags,
+           SafeLibraryHandle lpSource,
+           uint dwMessageId,
+           uint dwLanguageId,
+           out LocalAllocHandle lpBuffer,
+           uint nSize,
+           IntPtr Arguments
         );
 
         // http://msdn.microsoft.com/en-us/library/ms683152(v=vs.85).aspx
         [return: MarshalAs(UnmanagedType.Bool)]
 #if NETSTANDARD2_0
         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 #endif
-        [DllImport("kernel32.dll", CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Unicode)]
-        internal static extern bool FreeLibrary(IntPtr hModule);
+#if NET7_0_OR_GREATER
+        [LibraryImport("kernel32.dll")]
+        internal static partial bool FreeLibrary(
+#else
+        [DllImport("kernel32.dll")]
+        internal static extern bool FreeLibrary(
+#endif
+            IntPtr hModule);
 
         // http://msdn.microsoft.com/en-us/library/ms683200(v=vs.85).aspx
         [return: MarshalAs(UnmanagedType.Bool)]
-        [DllImport("kernel32.dll", EntryPoint = "GetModuleHandleExW", CallingConvention = CallingConvention.Winapi, SetLastError = true)]
+#if NET7_0_OR_GREATER
+        [LibraryImport("kernel32.dll", EntryPoint = "GetModuleHandleExW", SetLastError = true)]
+        internal static partial bool GetModuleHandleEx(
+#else
+        [DllImport("kernel32.dll", EntryPoint = "GetModuleHandleExW", SetLastError = true)]
         internal static extern bool GetModuleHandleEx(
-            [In] uint dwFlags,
-            [In] SafeLibraryHandle lpModuleName, // can point to a location within the module if GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS is set
-            [Out] out IntPtr phModule);
+#endif
+            uint dwFlags,
+            SafeLibraryHandle lpModuleName, // can point to a location within the module if GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS is set
+            out IntPtr phModule);
 
         // http://msdn.microsoft.com/en-us/library/ms683212(v=vs.85).aspx
-        [DllImport("kernel32.dll", CallingConvention = CallingConvention.Winapi, SetLastError = true)]
+#if NET7_0_OR_GREATER
+        [LibraryImport("kernel32.dll", SetLastError = true)]
+        internal static partial IntPtr GetProcAddress(
+#else
+        [DllImport("kernel32.dll", SetLastError = true)]
         internal static extern IntPtr GetProcAddress(
-            [In] SafeLibraryHandle hModule,
-            [In, MarshalAs(UnmanagedType.LPStr)] string lpProcName);
+#endif
+            SafeLibraryHandle hModule,
+            [MarshalAs(UnmanagedType.LPStr)] string lpProcName);
 
         // http://msdn.microsoft.com/en-us/library/windows/desktop/ms684179(v=vs.85).aspx
-        [DllImport("kernel32.dll", EntryPoint = "LoadLibraryExW", CallingConvention = CallingConvention.Winapi, SetLastError = true)]
+#if NET7_0_OR_GREATER
+        [LibraryImport("kernel32.dll", EntryPoint = "LoadLibraryExW", SetLastError = true)]
+        internal static partial SafeLibraryHandle LoadLibraryEx(
+#else
+        [DllImport("kernel32.dll", EntryPoint = "LoadLibraryExW", SetLastError = true)]
         internal static extern SafeLibraryHandle LoadLibraryEx(
-            [In, MarshalAs(UnmanagedType.LPWStr)] string lpFileName,
-            [In] IntPtr hFile,
-            [In] uint dwFlags);
+#endif
+            [MarshalAs(UnmanagedType.LPWStr)] string lpFileName,
+            IntPtr hFile,
+            uint dwFlags);
 
 #pragma warning disable CS8763 // A method marked [DoesNotReturn] should not return.
         [DoesNotReturn]