If you searched for “what does fixed do in c,” you are likely encountering a common point of confusion between the C programming language and C#. The short answer is that fixed is not a keyword in standard C. It belongs to C#, a language that shares syntactic roots with C but handles memory in a fundamentally different way. In practice, in C#, the fixed statement is used to “pin” a managed object in memory so that the garbage collector cannot relocate it while you are working with its address through a pointer. This article explains exactly what fixed does, when to use it, how it compares to traditional C, and what pitfalls to avoid Nothing fancy..
C versus C#: A Necessary Distinction
Standard C (C89, C99, C11, C17, and C23) does not have a fixed keyword. When you allocate memory in C using malloc or declare a local array, that memory remains at the same address until you explicitly free it or the program terminates. Because standard C has no moving garbage collector, there is no need to “pin” anything in place Not complicated — just consistent. Turns out it matters..
C#, on the other hand, runs on the .NET runtime and relies on a garbage collector (GC) that can move objects around in memory
