Switch to C# language version 14

.github/workflows/build.yml

@@ -28,6 +28,7 @@ jobs:
           dotnet-version: |
             8.0.x
             9.0.x
+            10.0.x
 
       # -----
       # Build

appveyor.yml

@@ -18,6 +18,12 @@ for:
     only:
     - image: Ubuntu2204
 
+  # install .NET 10 SDK
+  install:
+  - curl -L https://dot.net/v1/dotnet-install.sh -o dotnet-install.sh
+  - chmod +x ./dotnet-install.sh
+  - sudo ./dotnet-install.sh --channel 10.0 --install-dir /usr/share/dotnet
+
   # build and run tests
   build_script:
   - uname -a
@@ -46,6 +52,10 @@ for:
           Update-AppveyorBuild -Version ($env:APPVEYOR_REPO_TAG_NAME).TrimStart("v")
       }
 
+  # install .NET 10 SDK
+  install:
+  - cmd: choco install dotnet-10.0-sdk
+
   # build and run tests
   build_script:
   - cmd: build.cmd

buildscripts/common.props

@@ -1,7 +1,7 @@
 <Project>
 
 	<PropertyGroup>
-		<LangVersion>13.0</LangVersion>
+		<LangVersion>14.0</LangVersion>
 		<NoWarn>$(NoWarn);CS1591;CS3014;CS3003;CS3001;CS3021</NoWarn>
 		<NoWarn>$(NoWarn);CS0612;CS0618</NoWarn> <!-- TODO: Remove this line once `[Obsolete]` members have been dealt with. -->
 		<RepositoryType>git</RepositoryType>

src/Castle.Core.Tests/DynamicProxy.Tests/CustomModifiersTestCase.cs

@@ -150,7 +150,7 @@ public void ReflectionReturnsCorrectModoptOnParamTypeForGeneratedType(string typ
 
 			var modopts = this.generatedTypes[typeName].GetMethod("Foo").GetParameters()[0].GetOptionalCustomModifiers();
 
-			CollectionAssert.AreEqual(expected: CustomModifiersTestCase.customModifiers[typeNameWithoutSuffix].Reverse(), actual: modopts);
+			CollectionAssert.AreEqual(expected: Enumerable.Reverse(CustomModifiersTestCase.customModifiers[typeNameWithoutSuffix]), actual: modopts);
 			// ^ The emission of custom modifiers performed by DynamicProxy is currently geared towards
 			//   the CLR, which reports custom modifiers in reverse order. On Mono, before version 5.16,
 			//   Reflection would not report custom modifiers at all; this has now changed. But unlike the
@@ -183,7 +183,7 @@ public void ReflectionReturnsCorrectModreqsOnParamTypeForGeneratedType(string ty
 			var modreqs = this.generatedTypes[typeName].GetMethod("Foo").GetParameters()[0].GetRequiredCustomModifiers();
 			Assume.That(modreqs.Length > 0); // If this fails on mono/linux we have to revisit the commits and issues for IL method custom modifiers. https://github.com/castleproject/Core/issues/277
 
-			CollectionAssert.AreEqual(expected: CustomModifiersTestCase.customModifiers[typeNameWithoutSuffix].Reverse(), actual: modreqs);
+			CollectionAssert.AreEqual(expected: Enumerable.Reverse(CustomModifiersTestCase.customModifiers[typeNameWithoutSuffix]), actual: modreqs);
 			// ^ see comment about `.Reverse()` above.
 		}
 
@@ -205,7 +205,7 @@ public void ReflectionReturnsCorrectModoptOnReturnTypeForGeneratedType(string ty
 			var modopts = this.generatedTypes[typeName].GetMethod("Foo").ReturnParameter.GetOptionalCustomModifiers();
 			Assume.That(modopts.Length > 0); // If this fails on mono/linux we have to revisit the commits and issues for IL method custom modifiers. https://github.com/castleproject/Core/issues/277
 
-			CollectionAssert.AreEqual(expected: CustomModifiersTestCase.customModifiers[typeNameWithoutSuffix].Reverse(), actual: modopts);
+			CollectionAssert.AreEqual(expected: Enumerable.Reverse(CustomModifiersTestCase.customModifiers[typeNameWithoutSuffix]), actual: modopts);
 			// ^ see comment about `.Reverse()` above.
 		}
 
@@ -227,7 +227,7 @@ public void ReflectionReturnsCorrectModreqOnReturnTypeForGeneratedType(string ty
 			var modreqs = this.generatedTypes[typeName].GetMethod("Foo").ReturnParameter.GetRequiredCustomModifiers();
 			Assume.That(modreqs.Length > 0); // If this fails on mono/linux we have to revisit the commits and issues for IL method custom modifiers. https://github.com/castleproject/Core/issues/277
 
-			CollectionAssert.AreEqual(expected: CustomModifiersTestCase.customModifiers[typeNameWithoutSuffix].Reverse(), actual: modreqs);
+			CollectionAssert.AreEqual(expected: Enumerable.Reverse(CustomModifiersTestCase.customModifiers[typeNameWithoutSuffix]), actual: modreqs);
 			// ^ see comment about `.Reverse()` above.
 		}
 

src/Castle.Core/DynamicProxy/Generators/Emitters/SimpleAST/FieldReference.cs

@@ -53,7 +53,7 @@ public FieldBuilder FieldBuilder
 
 		public FieldInfo Reference
 		{
-			get { return field; }
+			get { return @field; }
 		}
 
 		public override void LoadAddressOfReference(ILGenerator gen)