System.Dynamic.BindingRestrictions.GetExpressionRestriction C# (CSharp) Method

        public static BindingRestrictions GetExpressionRestriction(Expression expression)
        {
            ContractUtils.RequiresNotNull(expression, nameof(expression));
            ContractUtils.Requires(expression.Type == typeof(bool), nameof(expression));
            return new CustomRestriction(expression);
        }

    private static BindingRestrictions AddRemoteObjectRestrictions(BindingRestrictions restrictions, object[] args, ReadOnlyCollection<ParameterExpression> parameters)
    {
#if !SILVERLIGHT

        for (int i = 0; i < parameters.Count; i++)
        {
            var expr = parameters[i];
            var value = args[i] as MarshalByRefObject;

            // special case for MBR objects.
            // when MBR objects are remoted they can have different conversion behavior
            // so bindings created for local and remote objects should not be mixed.
            if (value != null && !IsComObject(value))
            {
                BindingRestrictions remotedRestriction;
                if (RemotingServices.IsObjectOutOfAppDomain(value))
                {
                    remotedRestriction = BindingRestrictions.GetExpressionRestriction(
                                             Expression.AndAlso(
                                                 Expression.NotEqual(expr, Expression.Constant(null)),
                                                 Expression.Call(
                                                     typeof(RemotingServices).GetMethod("IsObjectOutOfAppDomain"),
                                                     expr
                                                 )
                                             )
                                         );
                }
                else
                {
                    remotedRestriction = BindingRestrictions.GetExpressionRestriction(
                                             Expression.AndAlso(
                                                 Expression.NotEqual(expr, Expression.Constant(null)),
                                                 Expression.Not(
                                                     Expression.Call(
                                                         typeof(RemotingServices).GetMethod("IsObjectOutOfAppDomain"),
                                                         expr
                                                     )
                                                 )
                                             )
                                         );
                }
                restrictions = restrictions.Merge(remotedRestriction);
            }
        }

#endif
        return restrictions;
    }