Microsoft.CSharp.RuntimeBinder.RuntimeBinder.InitializeCallingContext C# (CSharp) Method

        private void InitializeCallingContext(DynamicMetaObjectBinder payload)
        {
            // Set the context if the payload specifies it. Currently we only use this for calls.
            Type t = null;
            bool bChecked = false;
            if (payload is ICSharpInvokeOrInvokeMemberBinder)
            {
                t = (payload as ICSharpInvokeOrInvokeMemberBinder).CallingContext;
            }
            else if (payload is CSharpGetMemberBinder)
            {
                t = (payload as CSharpGetMemberBinder).CallingContext;
            }
            else if (payload is CSharpSetMemberBinder)
            {
                CSharpSetMemberBinder b = (CSharpSetMemberBinder)payload;
                t = b.CallingContext;
                bChecked = b.IsChecked;
            }
            else if (payload is CSharpGetIndexBinder)
            {
                t = (payload as CSharpGetIndexBinder).CallingContext;
            }
            else if (payload is CSharpSetIndexBinder)
            {
                CSharpSetIndexBinder b = (CSharpSetIndexBinder)payload;
                t = b.CallingContext;
                bChecked = b.IsChecked;
            }
            else if (payload is CSharpUnaryOperationBinder)
            {
                CSharpUnaryOperationBinder b = (CSharpUnaryOperationBinder)payload;
                t = b.CallingContext;
                bChecked = b.IsChecked;
            }
            else if (payload is CSharpBinaryOperationBinder)
            {
                CSharpBinaryOperationBinder b = (CSharpBinaryOperationBinder)payload;
                t = b.CallingContext;
                bChecked = b.IsChecked;
            }
            else if (payload is CSharpConvertBinder)
            {
                CSharpConvertBinder b = (CSharpConvertBinder)payload;
                t = b.CallingContext;
                bChecked = b.IsChecked;
            }
            else if (payload is CSharpIsEventBinder)
            {
                t = (payload as CSharpIsEventBinder).CallingContext;
            }

            if (t != null)
            {
                AggregateSymbol agg = _symbolTable.GetCTypeFromType(t).AsAggregateType().GetOwningAggregate();
                _bindingContext.m_pParentDecl = _semanticChecker.GetGlobalSymbolFactory().CreateAggregateDecl(agg, null);
            }
            else
            {
                // The binding context lives across invocations! If we don't reset this, then later calls might
                // bind in a previous call's context.
                _bindingContext.m_pParentDecl = null;
            }

            _bindingContext.CheckedConstant = bChecked;
            _bindingContext.CheckedNormal = bChecked;
        }