Reduce nesting in CSharpSources.GenerateComment.

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -362,9 +362,9 @@ namespace CppSharp.Generators.CSharp
                 PushBlock(BlockKind.BlockComment);
                 WriteLine(comment.FullComment.CommentToString(Options.CommentPrefix));
                 PopBlock();
+                return;
             }
-            else
-            {
+
             if (string.IsNullOrWhiteSpace(comment.BriefText))
                 return;
 
@@ -376,7 +376,6 @@ namespace CppSharp.Generators.CSharp
             WriteLine("{0} </summary>", Options.CommentPrefix);
             PopBlock();
         }
-        }
 
         public void GenerateInlineSummary(RawComment comment)
         {