Removed comments from internal functions. Changed their access from public to internal.

Signed-off-by: Dimitar Dobrev <dpldobrev@yahoo.com>

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -2339,7 +2339,6 @@ namespace CppSharp.Generators.CSharp
                 function = function.OriginalFunction;
 
             PushBlock(CSharpBlockKind.InternalsClassMethod);
-            GenerateDeclarationCommon(function);
             WriteLine("[SuppressUnmanagedCodeSecurity]");
 
             string libName = Options.SharedLibraryName;
@@ -2409,7 +2408,7 @@ namespace CppSharp.Generators.CSharp
                     @params.Add("int " + GeneratedIdentifier("forBases"));
             }
 
-            WriteLine("public static extern {0} {1}({2});", retType,
+            WriteLine("internal static extern {0} {1}({2});", retType,
                       GetFunctionNativeIdentifier(function),
                       string.Join(", ", @params));
             PopBlock(NewLineKind.BeforeNextBlock);