Is transfer between SOH and LOH possible in .NET?

Question

.NET

SOH (small object heap), LOH (large object heap). The documentation says that LOH stores objects whose size is greater than 85000 bytes. Two questions immediately arise from this - does the CLR move from SOH to LOH those objects that have bloated during their lifetime and vice versa, does it move from LOH to SOH when the size of the object decreases below the limit?

Answer 1

No, this does not happen, because the size of objects simply cannot change during operation.
The object is either immediately large or not immediately large

Answer 2

I think it will be most indicative of the classic example "why you can't add strings" which is given to illustrate the work with StringBuilder:
string x = "small";
x=x+"something big";