C# select row of runtime known type

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LINQ

reflection

I want to import a *.csv File with five columns.
for example:

ID;Number1;SomeText;SomethingElse

With Reflection.Emit i create at runtime the class and get the Type back.
Fill it with the informations from the file.

Now i want to query the object but the linq methods arnt available and its not possible to convert it into a list<object>.

how i can access a row in the object over ID? does anyone know how i create a
expression tree or something else to acomplish that? There are NO informations
about the class type with there fields at compiletime.

What I have tried:

CreateType includes the code for generating the class at runtime not necassary

var DynamicObject= CreateType(FirstPath); 
Type NewDynList = typeof(List<>);
Type NewDynObj = DynamicObject.GetType();
Type NewGenObj = NewDynList.MakeGenericType(NewDynObj);
var NewDynGenList = Activator.CreateInstance(NewGenObj);
NewDynGenList = ImportCsv(NewDynGenList , PathforCSV, NewDynObj );

after that code i get an object includig a list<dynamicobject> which is created at runtime, but the parameter "isGenericType" is NOT SET to true. so im not able to
create a List<object> which would include the Linq Methods.

private object ImportCsv(object DynamicObjectList, string Path, object DynamicObject)
{

    Type NewDynObj = DynamicObject.GetType();
    StreamReader readTemp = new StreamReader(Path);
    string line_ = readTemp.ReadLine();
    List<PropertyInfo> properties = DynamicObject.GetType().GetProperties().ToList();
    while (readTemp.Peek() > 1)
    {

        line_ = readTemp.ReadLine();
        string[] line_Values = line_.Split(';');
        if (properties.Count() != 0)
        {
            object NewDynOBjrow = Activator.CreateInstance(NewDynObj);
            for (int i = 0; i < line_Values.Length; i++)
            {
                NewDynOBjrow = SetValue(line_Values[i], properties[i].Name, NewDynOBjrow);
            }

            DynamicObjectList.GetType().GetMethod("Add").Invoke(DynamicObjectList, new[] { NewDynOBjrow });
        }
    }
    readTemp.Close();
    return DynamicObjectList;
}
private T SetValue<T>(string value, string field, T source)
{

    source.GetType().GetProperty(field).SetValue(source, value, null);
    return source;
}

With that 2 Methods i Fill the object with data from Csv. Field by Field row by row...
my target is to compare 2 *.csv Files with the same structure.

the informations arnt sorted and there could be differences in the count of rows...

so i have to select over "ID" and compare the columns, if the other file includes it.

I spent a lot of time searching, but i have found nothing that worked for me, or i was looking for with the wrong keywords.