Fix typo in oneof case enum comment

csharp/src/Google.Protobuf.Conformance/Conformance.cs

@@ -227,7 +227,7 @@ namespace Conformance {
     }
 
     private object payload_;
-    /// <summary>Enum of possibly cases for the "payload" oneof.</summary>
+    /// <summary>Enum of possible cases for the "payload" oneof.</summary>
     public enum PayloadOneofCase {
       None = 0,
       ProtobufPayload = 1,
@@ -434,7 +434,7 @@ namespace Conformance {
     }
 
     private object result_;
-    /// <summary>Enum of possibly cases for the "result" oneof.</summary>
+    /// <summary>Enum of possible cases for the "result" oneof.</summary>
     public enum ResultOneofCase {
       None = 0,
       ParseError = 1,
@@ -1244,7 +1244,7 @@ namespace Conformance {
     }
 
     private object oneofField_;
-    /// <summary>Enum of possibly cases for the "oneof_field" oneof.</summary>
+    /// <summary>Enum of possible cases for the "oneof_field" oneof.</summary>
     public enum OneofFieldOneofCase {
       None = 0,
       OneofUint32 = 111,

csharp/src/Google.Protobuf.Test/TestProtos/UnittestIssues.cs

@@ -1170,7 +1170,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     private object o1_;
-    /// <summary>Enum of possibly cases for the "o1" oneof.</summary>
+    /// <summary>Enum of possible cases for the "o1" oneof.</summary>
     public enum O1OneofCase {
       None = 0,
       O1String = 2,
@@ -1187,7 +1187,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     private object o2_;
-    /// <summary>Enum of possibly cases for the "o2" oneof.</summary>
+    /// <summary>Enum of possible cases for the "o2" oneof.</summary>
     public enum O2OneofCase {
       None = 0,
       O2Int32 = 6,

csharp/src/Google.Protobuf.Test/TestProtos/UnittestProto3.cs

@@ -717,7 +717,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     private object oneofField_;
-    /// <summary>Enum of possibly cases for the "oneof_field" oneof.</summary>
+    /// <summary>Enum of possible cases for the "oneof_field" oneof.</summary>
     public enum OneofFieldOneofCase {
       None = 0,
       OneofUint32 = 111,
@@ -4274,7 +4274,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     private object foo_;
-    /// <summary>Enum of possibly cases for the "foo" oneof.</summary>
+    /// <summary>Enum of possible cases for the "foo" oneof.</summary>
     public enum FooOneofCase {
       None = 0,
       FooInt = 1,

csharp/src/Google.Protobuf.Test/TestProtos/UnittestWellKnownTypes.cs

@@ -1470,7 +1470,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     private object oneofField_;
-    /// <summary>Enum of possibly cases for the "oneof_field" oneof.</summary>
+    /// <summary>Enum of possible cases for the "oneof_field" oneof.</summary>
     public enum OneofFieldOneofCase {
       None = 0,
       AnyField = 1,

csharp/src/Google.Protobuf/WellKnownTypes/Struct.cs

@@ -255,7 +255,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     private object kind_;
-    /// <summary>Enum of possibly cases for the "kind" oneof.</summary>
+    /// <summary>Enum of possible cases for the "kind" oneof.</summary>
     public enum KindOneofCase {
       None = 0,
       NullValue = 1,

src/google/protobuf/compiler/csharp/csharp_message.cc

@@ -169,7 +169,7 @@ void MessageGenerator::Generate(io::Printer* printer) {
     printer->Print(
       vars,
       "private object $name$_;\n"
-      "/// <summary>Enum of possibly cases for the \"$original_name$\" oneof.</summary>\n"
+      "/// <summary>Enum of possible cases for the \"$original_name$\" oneof.</summary>\n"
       "public enum $property_name$OneofCase {\n");
     printer->Indent();
     printer->Print("None = 0,\n");