LINQ Expression Conversion / Concat from Int to string

Question

I want to Concat two expressions for the final expression

Expression>

So I have created expression belwo code

Answer 1

It can be further simplified to:

var convertedExpression = Expression.Call(
                     memberExpression,
                     typeof(object).GetMethod("ToString"));

Answer 2

Instead of trying to cast to string, you could try casting to object then calling ToString(), as though you were doing:

var converted = member.ToString();

As an Expression, it will look something like this:

var convertedExpression = Expression.Call(
                     Expression.Convert(memberExpression, typeof(object)),
                     typeof(object).GetMethod("ToString"));

Answer 3

Rather than calling string.Concat(string, string), you could try calling string.Concat(object, object):

MethodInfo bodyContactMethod = typeof (string).GetMethod("Concat", 
   new[] { typeof(object), typeof(object) });

Answer 4

To expand on Richard Deeming's answer even though it's a little late.

Expression.Call(
    typeof(string).GetMethod("Concat", new[] { typeof(object), typeof(object) }),
    Expression.Convert(cons, typeof(object)),
    Expression.Convert(memberExpression, typeof(object))
);

That should work just fine while allowing the signature to stay as you have it.