C#: Add some examples of uses of the Experimental attribute and update the expected test output.

Author: michaelnebel

csharp/ql/test/library-tests/attributes/AttributeArguments.expected

@@ -106,6 +106,8 @@ arguments
 | attributes.cs:151:6:151:11 | [Params(...)] | 0 | attributes.cs:151:45:151:47 | "a" |
 | attributes.cs:151:6:151:11 | [Params(...)] | 1 | attributes.cs:151:36:151:38 | "b" |
 | attributes.cs:151:6:151:11 | [Params(...)] | 2 | attributes.cs:151:19:151:29 | array creation of type Int32[] |
+| attributes.cs:155:2:155:13 | [Experimental(...)] | 0 | attributes.cs:155:15:155:35 | "MyExperimentalClass" |
+| attributes.cs:158:6:158:17 | [Experimental(...)] | 0 | attributes.cs:158:19:158:40 | "MyExperimentalMethod" |
 constructorArguments
 | Assembly1.dll:0:0:0:0 | [Custom(...)] | 0 | Assembly1.dll:0:0:0:0 | 1 |
 | Assembly1.dll:0:0:0:0 | [Custom(...)] | 0 | Assembly1.dll:0:0:0:0 | 3 |
@@ -202,6 +204,8 @@ constructorArguments
 | attributes.cs:151:6:151:11 | [Params(...)] | 0 | attributes.cs:151:45:151:47 | "a" |
 | attributes.cs:151:6:151:11 | [Params(...)] | 1 | attributes.cs:151:36:151:38 | "b" |
 | attributes.cs:151:6:151:11 | [Params(...)] | 2 | attributes.cs:151:19:151:29 | array creation of type Int32[] |
+| attributes.cs:155:2:155:13 | [Experimental(...)] | 0 | attributes.cs:155:15:155:35 | "MyExperimentalClass" |
+| attributes.cs:158:6:158:17 | [Experimental(...)] | 0 | attributes.cs:158:19:158:40 | "MyExperimentalMethod" |
 namedArguments
 | Assembly1.dll:0:0:0:0 | [Custom(...)] | Prop2 | Assembly1.dll:0:0:0:0 | array creation of type Object[] |
 | Assembly1.dll:0:0:0:0 | [Custom(...)] | Prop2 | Assembly1.dll:0:0:0:0 | array creation of type Object[] |

csharp/ql/test/library-tests/attributes/AttributeElements.expected

@@ -36,6 +36,8 @@
 | attributes.cs:146:17:146:18 | M2 | attributes.cs:145:6:145:11 | [Params(...)] | Class1+ParamsAttribute |
 | attributes.cs:149:17:149:18 | M3 | attributes.cs:148:6:148:11 | [Params(...)] | Class1+ParamsAttribute |
 | attributes.cs:152:17:152:18 | M4 | attributes.cs:151:6:151:11 | [Params(...)] | Class1+ParamsAttribute |
+| attributes.cs:156:14:156:32 | MyExperimentalClass | attributes.cs:155:2:155:13 | [Experimental(...)] | System.Diagnostics.CodeAnalysis.ExperimentalAttribute |
+| attributes.cs:159:17:159:36 | MyExperimentalMethod | attributes.cs:158:6:158:17 | [Experimental(...)] | System.Diagnostics.CodeAnalysis.ExperimentalAttribute |
 | attributes.dll:0:0:0:0 | attributes, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null | attributes.cs:11:12:11:24 | [assembly: AssemblyTitle(...)] | System.Reflection.AssemblyTitleAttribute |
 | attributes.dll:0:0:0:0 | attributes, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null | attributes.cs:12:12:12:30 | [assembly: AssemblyDescription(...)] | System.Reflection.AssemblyDescriptionAttribute |
 | attributes.dll:0:0:0:0 | attributes, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null | attributes.cs:13:12:13:32 | [assembly: AssemblyConfiguration(...)] | System.Reflection.AssemblyConfigurationAttribute |

csharp/ql/test/library-tests/attributes/PrintAst.expected

@@ -461,3 +461,15 @@ attributes.cs:
 #  151|           -1: [ArrayInitializer] { ..., ... }
 #  151|             0: [IntLiteral] 1
 #  152|     4: [BlockStmt] {...}
+#  156| [Class] MyExperimentalClass
+#-----|   0: (Attributes)
+#  155|     1: [DefaultAttribute] [Experimental(...)]
+#  155|       -1: [TypeMention] ExperimentalAttribute
+#  155|       0: [StringLiteralUtf16] "MyExperimentalClass"
+#  159|   5: [Method] MyExperimentalMethod
+#  159|     -1: [TypeMention] Void
+#-----|     0: (Attributes)
+#  158|       1: [DefaultAttribute] [Experimental(...)]
+#  158|         -1: [TypeMention] ExperimentalAttribute
+#  158|         0: [StringLiteralUtf16] "MyExperimentalMethod"
+#  159|     4: [BlockStmt] {...}

csharp/ql/test/library-tests/attributes/attributes.cs

@@ -152,3 +152,9 @@ public void M3() { }
     public void M4() { }
 }
 
+[Experimental("MyExperimentalClass")]
+public class MyExperimentalClass
+{
+    [Experimental("MyExperimentalMethod")]
+    public void MyExperimentalMethod() { }
+}