Repository: dotnet/roslyn
File: src/Compilers/CSharp/Portable/Symbols/Synthesized/SynthesizedEntryPointSymbol.cs (C#)

Code before:
        }

        protected sealed override bool HasSetsRequiredMembersImpl => throw ExceptionUtilities.Unreachable();

        internal sealed override bool HasUnscopedRefAttribute => false;

        internal sealed override bool UseUpdatedEscapeRules => ContainingModule.UseUpdatedEscapeRules;

        internal sealed override bool HasAsyncMethodBuilderAttribute(out TypeSymbol builderArgument)
        {
            builderArgument = null;
            return false;
        }

        internal override int TryGetOverloadResolutionPriority()
        {
            return 0;
        }

        /// <summary> A synthesized entrypoint that forwards all calls to an async Main Method </summary>
        internal sealed class AsyncForwardEntryPoint : SynthesizedEntryPointSymbol
        {
            /// <summary> The syntax for the user-defined asynchronous main method. </summary>
            private readonly CSharpSyntaxNode _userMainReturnTypeSyntax;

            private readonly BoundExpression _userEntryPointCall;

            private readonly ImmutableArray<ParameterSymbol> _parameters;

            /// <summary> The user-defined asynchronous main method. </summary>
            internal readonly MethodSymbol UserMain;

            internal AsyncForwardEntryPoint(CSharpCompilation compilation, NamedTypeSymbol containingType, MethodSymbol userMain) :
                base(containingType)
            {
                // There should be no way for a userMain to be passed in unless it already passed the 
                // parameter checks for determining entrypoint validity.
                Debug.Assert(userMain.ParameterCount == 0 || userMain.ParameterCount == 1);

                UserMain = userMain;
                _userMainReturnTypeSyntax = userMain.ExtractReturnTypeSyntax();
                var binder = compilation.GetBinder(_userMainReturnTypeSyntax);
                _parameters = SynthesizedParameterSymbol.DeriveParameters(userMain, this);

                var arguments = Parameters.SelectAsArray((p, s) => (BoundExpression)new BoundParameter(s, p, p.Type), _userMainReturnTypeSyntax);

                // Main(args) or Main()
                BoundCall userMainInvocation = new BoundCall(
                        syntax: _userMainReturnTypeSyntax,
                        receiverOpt: null,
                        initialBindingReceiverIsSubjectToCloning: ThreeState.Unknown,

Review comment (suggestion):
>_userEntryPointCall [](http://example.com/codeflow?start=45&length=19)

Consider adding a comment explaining what can this be? #Closed

Code after:
        }

        protected sealed override bool HasSetsRequiredMembersImpl => throw ExceptionUtilities.Unreachable();

        internal sealed override bool HasUnscopedRefAttribute => false;

        internal sealed override bool UseUpdatedEscapeRules => ContainingModule.UseUpdatedEscapeRules;

        internal sealed override bool HasAsyncMethodBuilderAttribute(out TypeSymbol builderArgument)
        {
            builderArgument = null;
            return false;
        }

        internal override int TryGetOverloadResolutionPriority()
        {
            return 0;
        }

        /// <summary> A synthesized entrypoint that forwards all calls to an async Main Method </summary>
        internal sealed class AsyncForwardEntryPoint : SynthesizedEntryPointSymbol
        {
            /// <summary> The syntax for the user-defined asynchronous main method. </summary>
            private readonly CSharpSyntaxNode _userMainReturnTypeSyntax;

            /// <summary>
            /// Either a call to AsyncHelpers.HandleAsyncEntryPoint or a call to GetAwaiter().GetResult() on the user-defined main method.
            /// </summary>
            private readonly BoundExpression _userEntryPointInvocation;

            private readonly ImmutableArray<ParameterSymbol> _parameters;

            /// <summary> The user-defined asynchronous main method. </summary>
            internal readonly MethodSymbol UserMain;

            internal AsyncForwardEntryPoint(CSharpCompilation compilation, NamedTypeSymbol containingType, MethodSymbol userMain) :
                base(containingType)
            {
                // There should be no way for a userMain to be passed in unless it already passed the 
                // parameter checks for determining entrypoint validity.
                Debug.Assert(userMain.ParameterCount == 0 || userMain.ParameterCount == 1);

                UserMain = userMain;
                _userMainReturnTypeSyntax = userMain.ExtractReturnTypeSyntax();
                var binder = compilation.GetBinder(_userMainReturnTypeSyntax);
                _parameters = SynthesizedParameterSymbol.DeriveParameters(userMain, this);

                var arguments = Parameters.SelectAsArray((p, s) => (BoundExpression)new BoundParameter(s, p, p.Type), _userMainReturnTypeSyntax);

                // Main(args) or Main()
                BoundCall userMainInvocation = new BoundCall(