create.sol

uint salt = 0x123;
bool success;
// order matters!
bytes memory p = abi.encode(param1, ..., paramn);
bytes memory c = type(C).creationCode;
assembly {
  function memCopyPadded(from, to, length) {
    for { let i := 0 } lt(i, length) { i := add(i, 0x20) } {
      mstore(to, mload(from))
      to := add(to, 0x20)
      from := add(from, 0x20)
    }
  }
  let codeLen := mload(c)
  let paramLen := mload(p)
  memCopyPadded(add(p, 0x20), add(add(c, 0x20), codeLen), paramlen)
  success := create2(0, add(c, 0x20), add(codeLen, paramLen), salt)
}