Parameter ordering: Destinations on the left

Most (all?) programming languages write assignment with the destination variable on the left hand side, i.e.

a = b+c;

Therefore most (all?) programmers are familiar with the destination for an operation being on the left hand side. Therefore, I think, when designing functions or commands doing copying or assignment, the result should also be on the left hand side.

Example: memcpy in C.
Counter-example (which confuses me): Array.copy in C#.

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