I have the following C#-code:

while (...)
{
    ...(out var information);
    dynamic obj = JsonConvert.DeserializeObject(information);

    if (obj.Some_Property != null)
    {

As you see, it creates an object, based on a string, called information.

But, that information sometimes is incomplete, so I need to split this function, and I arrive at this:

string partial_information = "";
dynamic obj;
while (...)
{
    ... (out information);
    
    if (partial_information == "")
    {
        try
        {
            obj = JsonConvert.DeserializeObject(information);
        }
        catch (Newtonsoft.Json.JsonReaderException ex)
               // 'information' only contains the first part of the actual information
        {
            partial_information = information;
        }
    }
    else
    {
        obj = JsonConvert.DeserializeObject(partial_information + information);
                // in the previous loop, some 'information' was written to 'partial_information'.
                // Now the concatenation of both is used for deserialising the info.
        partial_information = ""; // don't forget to re-initialise afterwards
    }

    if (obj.Some_Property  != null) // <-- Compiler error (!!!)
    {

This, however, does not compile: the line if (obj.Some_Property != null) generates a CS1065 compiler error: Use of unassigned local variable 'obj'.

In my opinion, this makes no sense, as obj is declared even outside of the whole while-loop.

How can I handle this?
Thanks in advance