private Expression Build(Expression leftExpression)
{
if (leftExpression.Type.IsList())
{
return(leftExpression.GetConcatCall(Right.Build()));
}
else if (leftExpression.Type == typeof(string))
{
return(LinqHelpers.GetStringConcatCall(leftExpression, Right.Build()));
}
else
{
throw new ArgumentException(nameof(leftExpression));
}
}
